Skip to main content

Research Repository

Advanced Search

Outputs (184)

The EDIBLES Survey: VIII. Band profile alignment of diffuse interstellar bands (2024)
Journal Article
Ebenbichler, A., Smoker, J. V., Lallement, R., Farhang, A., Cox, N. L. J., Joblin, C., …Cordiner, M. (2024). The EDIBLES Survey: VIII. Band profile alignment of diffuse interstellar bands. Astronomy & Astrophysics, 686, Article A50. https://doi.org/10.1051/0004-6361/202348871

Context. There have been many attempts to identify families of diffuse interstellar bands (DIBs) with perfectly correlating band strengths. Although major efforts have been made to classify broadly based DIB families and important insights have been... Read More about The EDIBLES Survey: VIII. Band profile alignment of diffuse interstellar bands.

SMC-Last Extracted Photometry (2024)
Journal Article
Kuchar, T. A., Sloan, G. C., Mizuno, D. R., Kraemer, K. E., Boyer, M. L., Groenewegen, M. A. T., …Zijlstra, A. (2024). SMC-Last Extracted Photometry. Astronomical Journal, 167(4), Article 149. https://doi.org/10.3847/1538-3881/ad2601

We present point-source photometry from the Spitzer Space Telescope's final survey of the Small Magellanic Cloud (SMC). We mapped nearly 30 deg2 in two epochs in 2017, with the second extending to early 2018 at 3.6 and 4.5 μm using the Infrared Array... Read More about SMC-Last Extracted Photometry.

The MeerKAT 1.3 GHz Survey of the Small Magellanic Cloud (2024)
Journal Article
Cotton, W. D., Filipović, M. D., Camilo, F., Indebetouw, R., Alsaberi, R. Z. E., Anih, J. O., …Serylak, M. (in press). The MeerKAT 1.3 GHz Survey of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 529(3), 2443-2472. https://doi.org/10.1093/mnras/stae277

We present new radio continuum images and a source catalogue from the MeerKAT survey in the direction of the Small Magellanic Cloud (SMC). The observations, at a central frequency of 1.3 GHz across a bandwidth of 0.8 GHz, encompass a field of view ∼7... Read More about The MeerKAT 1.3 GHz Survey of the Small Magellanic Cloud.

A Galactic Eclipse: The Small Magellanic Cloud Is Forming Stars in Two Superimposed Systems (2024)
Journal Article
Murray, C. E., Hasselquist, S., Peek, J. E. G., Lindberg, C. W., Almeida, A., Choi, Y., …van Loon, J. T. (2024). A Galactic Eclipse: The Small Magellanic Cloud Is Forming Stars in Two Superimposed Systems. Astrophysical Journal, 962(2), Article 120. https://doi.org/10.3847/1538-4357/ad1591

The structure and dynamics of the star-forming disk of the Small Magellanic Cloud (SMC) have long confounded us. The SMC is widely used as a prototype for galactic physics at low metallicity, and yet we fundamentally lack an understanding of the stru... Read More about A Galactic Eclipse: The Small Magellanic Cloud Is Forming Stars in Two Superimposed Systems.

The EDIBLES survey: VII. A survey of C2 and C3 in interstellar clouds (2023)
Journal Article
Fan, H., Rocha, C. M. R., Cordiner, M., Linnartz, H., Cox, N. L. J., Farhang, A., …Cami, J. (2024). The EDIBLES survey: VII. A survey of C2 and C3 in interstellar clouds. Astronomy & Astrophysics, 681, Article A6. https://doi.org/10.1051/0004-6361/202243910

Context. Small linear carbon chain radicals such as C2 and C3 act as both the building blocks and dissociation fragments of larger carbonaceous species. Their rotational excitation traces the temperature and density of local environments. However, th... Read More about The EDIBLES survey: VII. A survey of C2 and C3 in interstellar clouds.

ALMA Observations of Supernova Remnant N49 in the Large Magellanic Cloud. II. Non-LTE Analysis of Shock-heated Molecular Clouds (2023)
Journal Article
Sano, H., Yamane, Y., van Loon, J. T., Furuya, K., Fukui, Y., Alsaberi, R. Z. E., …Tachihara, K. (2023). ALMA Observations of Supernova Remnant N49 in the Large Magellanic Cloud. II. Non-LTE Analysis of Shock-heated Molecular Clouds. Astrophysical Journal, 958(1), Article 53. https://doi.org/10.3847/1538-4357/acffbe

We present the first compelling evidence of shock-heated molecular clouds associated with the supernova remnant (SNR) N49 in the Large Magellanic Cloud (LMC). Using 12CO(J = 2–1, 3–2) and 13CO(J = 2–1) line emission data taken with the Atacama Large... Read More about ALMA Observations of Supernova Remnant N49 in the Large Magellanic Cloud. II. Non-LTE Analysis of Shock-heated Molecular Clouds.

ATCA Study of Small Magellanic Cloud Supernova Remnant 1E 0102.2–7219 (2023)
Journal Article
Alsaberi, R. Z. E., Filipović, M. D., Dai, S., Sano, H., Kothes, R., Payne, J. L., …Vogt, F. P. A. (2024). ATCA Study of Small Magellanic Cloud Supernova Remnant 1E 0102.2–7219. Monthly Notices of the Royal Astronomical Society, 527(1), 1444-1460. https://doi.org/10.1093/mnras/stad3300

We present new and archival Australia Telescope Compact Array and Atacama Large Millimeter/submillimeter Array data of the Small Magellanic Cloud supernova remnant 1E 0102.2–7219 at 2100, 5500, 9000, and 108000 MHz; as well as H i data provided by th... Read More about ATCA Study of Small Magellanic Cloud Supernova Remnant 1E 0102.2–7219.

The EDIBLES survey: VI. Searching for time variations of interstellar absorption features (2023)
Journal Article
Farhang, A., Smoker, J., Cox, N. L. J., Cami, J., Linnartz, H., van Loon, J. T., …Laverick, M. (2023). The EDIBLES survey: VI. Searching for time variations of interstellar absorption features. Astronomy & Astrophysics, 678, Article A148. https://doi.org/10.1051/0004-6361/202037581

Context. Interstellar absorption observed toward stellar targets changes slowly over long timescales, mainly due to the proper motion of the background target relative to the intervening clouds, such that over time, different parts of the intervening... Read More about The EDIBLES survey: VI. Searching for time variations of interstellar absorption features.

A new method for spatially resolving the turbulence driving mixture in the ISM with application to the Small Magellanic Cloud (2023)
Journal Article
Gerrard, I. A., Federrath, C., Pingel, N. M., McClure-Griffiths, N. M., Marchal, A., Joncas, G., …Lynn, C. (2023). A new method for spatially resolving the turbulence driving mixture in the ISM with application to the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 526(1), https://doi.org/10.1093/mnras/stad2718

Turbulence plays a crucial role in shaping the structure of the interstellar medium. The ratio of the three-dimensional density contrast ($\sigma _{\rho /\rho _0}$) to the turbulent sonic Mach number ($\mathcal {M}$) of an isothermal, compressible ga... Read More about A new method for spatially resolving the turbulence driving mixture in the ISM with application to the Small Magellanic Cloud.

Hubble Space Telescope imaging of the compact elliptical galaxy M32 reveals a dearth of carbon stars (2023)
Journal Article
Jones, O. C., Boyer, M. L., McDonald, I., Meixner, M., & van Loon, J. T. (2023). Hubble Space Telescope imaging of the compact elliptical galaxy M32 reveals a dearth of carbon stars. Monthly Notices of the Royal Astronomical Society, 525(3), 3693-3702. https://doi.org/10.1093/mnras/stad2472

We present new Hubble Space Telescope WFC3/IR medium-band photometry of the compact elliptical galaxy M32, chemically resolving its thermally pulsating asymptotic giant branch stars. We find 2829 M-type stars and 57 C stars. The carbon stars are like... Read More about Hubble Space Telescope imaging of the compact elliptical galaxy M32 reveals a dearth of carbon stars.

Kinematics of stellar substructures in the small magellanic cloud (2023)
Journal Article
El Youssoufi, D., Cioni, M. L., Kacharov, N., Bell, C. P. M., Matjevic, G., Bekki, K., …van Loon, J. T. (2023). Kinematics of stellar substructures in the small magellanic cloud. Monthly Notices of the Royal Astronomical Society, 523(1), 347-364. https://doi.org/10.1093/mnras/stad1339

We present a kinematic analysis of the Small Magellanic Cloud using 3700 spectra extracted from the European Southern Observatory archive. We used data from Gaia and near-infrared photometry to select stellar populations and discard Galactic foregrou... Read More about Kinematics of stellar substructures in the small magellanic cloud.

The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. VI. The Star Formation History and Dust Production in Andromeda IX (2023)
Journal Article
Abdollahi, H., Javadi, A., Mirtorabi, M. T., Saremi, E., van Loon, J. T., Khosroshahi, H. G. G., …Torki, M. (2023). The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. VI. The Star Formation History and Dust Production in Andromeda IX. Astrophysical Journal, 948(1), Article 63. https://doi.org/10.3847/1538-4357/acbbc9

We present a photometric study of the resolved stellar populations in Andromeda IX (And IX), the closest satellite to M31, a metal-poor and low-mass dwarf spheroidal galaxy. We estimate a distance modulus of 24.56(-0.05)(+0.15) mag based on the tip o... Read More about The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. VI. The Star Formation History and Dust Production in Andromeda IX.

H I filaments as potential compass needles? Comparing the magnetic field structure of the Small Magellanic Cloud to the orientation of GASKAP-H I filaments (2023)
Journal Article
Van Loon, J. T., Ma, Y. K., McClure-Griffiths, N. M., Clark, S. E., Gibson, S. J., Soler, J. D., …Pingel, N. M. (2023). H I filaments as potential compass needles? Comparing the magnetic field structure of the Small Magellanic Cloud to the orientation of GASKAP-H I filaments. Monthly Notices of the Royal Astronomical Society, 521(1), 60 - 83. https://doi.org/10.1093/mnras/stad462

High-spatial-resolution H i observations have led to the realization that the nearby (within few hundreds of parsecs) Galactic atomic filamentary structures are aligned with the ambient magnetic field. Enabled by the high-quality data from the Austra... Read More about H I filaments as potential compass needles? Comparing the magnetic field structure of the Small Magellanic Cloud to the orientation of GASKAP-H I filaments.

The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. V. The Star Formation History of Sagittarius Dwarf Irregular Galaxy Derived from Long-period Variable Stars (2023)
Journal Article
Van Loon, J. (2023). The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. V. The Star Formation History of Sagittarius Dwarf Irregular Galaxy Derived from Long-period Variable Stars. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aca471

We conducted an optical monitoring survey of the Sagittarius dwarf irregular galaxy (SagDIG) during the period of 2016 June–2017 October, using the 2.5 m Isaac Newton Telescopeat La Palama. Our goal was to identify long-period variable stars (LPVs),... Read More about The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. V. The Star Formation History of Sagittarius Dwarf Irregular Galaxy Derived from Long-period Variable Stars.

The VLT-FLAMES Tarantula Survey Observational evidence for two distinct populations of massive runaway stars in 30 Doradus (2022)
Journal Article
Observational evidence for two distinct populations of massive runaway stars in 30 Doradus. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202244677

Context. The origin of massive runaway stars is an important unsolved problem in astrophysics. Two main scenarios have been proposed, namely: dynamical ejection or release from a binary at the first core collapse. However, their relative contribution... Read More about The VLT-FLAMES Tarantula Survey Observational evidence for two distinct populations of massive runaway stars in 30 Doradus.

New ASKAP radio supernova remnants and candidates in the Large Magellanic Cloud (2022)
Journal Article
Bozzetto, L. M., Filipović, M. D., Sano, H., Alsaberi, R. Z. E., Barnes, L. A., Bojičić, I. S., …Zangrandi, F. (2022). New ASKAP radio supernova remnants and candidates in the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 518(2), 2574-2598. https://doi.org/10.1093/mnras/stac2922

We present a new Australian Square Kilometre Array Pathfinder (ASKAP) sample of 14 radio supernova remnants (SNR) candidates in the Large Magellanic Cloud (LMC). This new sample is a significant increase to the known number of older, larger, and low... Read More about New ASKAP radio supernova remnants and candidates in the Large Magellanic Cloud.

Massive young stellar objects in the Local Group spiral galaxy M 33 identified using machine learning (2022)
Journal Article
Kinson, D., Oliveira, J., & Van Loon, J. (2022). Massive young stellar objects in the Local Group spiral galaxy M 33 identified using machine learning. Monthly Notices of the Royal Astronomical Society, 140 - 160. https://doi.org/10.1093/mnras/stac2692

We present a supervised machine learning classification of stellar populations in the Local Group spiral galaxy M?33. The Probabilistic Random Forest (PRF) methodology, previously applied to populations in NGC?6822, utilizes both near and far-IR clas... Read More about Massive young stellar objects in the Local Group spiral galaxy M 33 identified using machine learning.

GASKAP-HI Pilot Survey Science III: An unbiased view of cold gas in the Small Magellanic Cloud (2022)
Journal Article
Van Loon. (2022). GASKAP-HI Pilot Survey Science III: An unbiased view of cold gas in the Small Magellanic Cloud. Publications of the Astronomical Society of Australia, https://doi.org/10.1017/pasa.2022.18

Abstract We present the first unbiased survey of neutral hydrogen absorption in the Small Magellanic Cloud. The survey utilises pilot neutral hydrogen observations with the Australian Square Kilometre Array Pathfinder telescope as part of the Galacti... Read More about GASKAP-HI Pilot Survey Science III: An unbiased view of cold gas in the Small Magellanic Cloud.

The VMC survey - XLIX. Discovery of a population of quasars dominated by nuclear dust emission behind the Magellanic Clouds (2022)
Journal Article
Pennock, C. M., Th van Loon, J., Anih, J. O., Maitra, C., Haberl, F., Sansom, A. E., …Vardoulaki, E. (2022). The VMC survey - XLIX. Discovery of a population of quasars dominated by nuclear dust emission behind the Magellanic Clouds. Monthly Notices of the Royal Astronomical Society, 515(4), 6046-6065. https://doi.org/10.1093/mnras/stac2096

Following the discovery of SAGE0536AGN (z ∼ 0.14), with the strongest 10-μm silicate emission ever observed for an active galactic nucleus (AGN), we discovered SAGE0534AGN (z ∼ 1.01), a similar AGN but with less extreme silicate emission. Both were o... Read More about The VMC survey - XLIX. Discovery of a population of quasars dominated by nuclear dust emission behind the Magellanic Clouds.

The Detection of Deuterated Water in the Large Magellanic Cloud with ALMA (2022)
Journal Article
Sewiło, M., Karska, A., Kristensen, L. E., Charnley, S. B., Rosie Chen, C., Oliveira, J. M., …Garcia-Berrios, E. (2022). The Detection of Deuterated Water in the Large Magellanic Cloud with ALMA. Astrophysical Journal, https://doi.org/10.3847/1538-4357/ac6de1

We report the first detection of deuterated water (HDO) toward an extragalactic hot core. The HDO 211–212 line has been detected toward hot cores N 105–2 A and 2 B in the N 105 star-forming region in the low-metallicity Large Magellanic Cloud (LMC) d... Read More about The Detection of Deuterated Water in the Large Magellanic Cloud with ALMA.

The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – III. The Large Magellanic Cloud (2022)
Journal Article
Van Loon, Bell, C. P. M., Cioni, M. L., Wright, A. H., Nidever, D. L., Chiang, I., …Zaritsky, D. (2022). The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – III. The Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 516(1), 824-840. https://doi.org/10.1093/mnras/stac1545

We present a map of the total intrinsic reddening across ≃ 90 deg2 of the Large Magellanic Cloud (LMC) derived using optical (ugriz) and near-infrared (IR; YJKs) spectral energy distributions (SEDs) of background galaxies. The reddening map is create... Read More about The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – III. The Large Magellanic Cloud.

ALMA Observations of Molecular Complexity in the Large Magellanic Cloud: The N 105 Star-forming Region (2022)
Journal Article
Sewiło, M., Cordiner, M., Charnley, S. B., Oliveira, J. M., Garcia-Berrios, E., Schilke, P., …Zahorecz, S. (2022). ALMA Observations of Molecular Complexity in the Large Magellanic Cloud: The N 105 Star-forming Region. Astrophysical Journal, 931(2), Article 102. https://doi.org/10.3847/1538-4357/ac4e8f

The Large Magellanic Cloud (LMC) is the nearest laboratory for detailed studies on the formation and survival of complex organic molecules (COMs), including biologically important ones, in low-metallicity environments-typical of earlier cosmological... Read More about ALMA Observations of Molecular Complexity in the Large Magellanic Cloud: The N 105 Star-forming Region.

The VMC survey. XLV. Proper motion of the outer LMC and the impact of the SMC (2022)
Journal Article
Oliveira, J., & Van Loon, J. (2022). The VMC survey. XLV. Proper motion of the outer LMC and the impact of the SMC. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202142148

Context. The Large Magellanic Cloud (LMC) is the most luminous satellite galaxy of the Milky Way and owing to its companion, the Small Magellanic Cloud (SMC), represents an excellent laboratory to study the interaction of dwarf galaxies. Aims. The... Read More about The VMC survey. XLV. Proper motion of the outer LMC and the impact of the SMC.

The Nearby Evolved Stars Survey II: Constructing a volume-limited sample and first results from the James Clerk Maxwell Telescope (2022)
Journal Article
Van Loon. (2022). The Nearby Evolved Stars Survey II: Constructing a volume-limited sample and first results from the James Clerk Maxwell Telescope. Monthly Notices of the Royal Astronomical Society, 1091 - 1110. https://doi.org/10.1093/mnras/stab2860

The Nearby Evolved Stars Survey (NESS) is a volume-complete sample of ~850 Galactic evolved stars within 3?kpc at (sub-)mm wavelengths, observed in the CO J = (2–1) and (3–2) rotational lines, and the sub-mm continuum, using the James Clark Maxwell T... Read More about The Nearby Evolved Stars Survey II: Constructing a volume-limited sample and first results from the James Clerk Maxwell Telescope.

Mysterious odd radio circle near the large magellanic cloud - an intergalactic supernova remnant? (2022)
Journal Article
Van Loon. (2022). Mysterious odd radio circle near the large magellanic cloud - an intergalactic supernova remnant?. Monthly Notices of the Royal Astronomical Society, 265 - 284. https://doi.org/10.1093/mnras/stac210

We report the discovery of J0624–6948, a low-surface brightness radio ring, lying between the Galactic Plane and the large magellanic cloud (LMC). It was first detected at 888 MHz with the Australian Square Kilometre Array Pathfinder (ASKAP), and wit... Read More about Mysterious odd radio circle near the large magellanic cloud - an intergalactic supernova remnant?.

The VMC survey - XLVI. Stellar proper motions in the centre of the Large Magellanic Cloud (2022)
Journal Article
Niederhofer, F., Cioni, M. L., Schmidt, T., Bekki, K., de Grijs, R., Ivanov, V. D., …Van Loon, J. T. (2022). The VMC survey - XLVI. Stellar proper motions in the centre of the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 512(4), 5423-5439. https://doi.org/10.1093/mnras/stac712

We present proper motion (PM) measurements within the central region of the Large Magellanic Cloud (LMC), using near-infrared data from the VISTA survey of the Magellanic Cloud system (VMC). This work encompasses 18 VMC tiles covering a total sky are... Read More about The VMC survey - XLVI. Stellar proper motions in the centre of the Large Magellanic Cloud.

The EDIBLES survey V: Line profile variations in the λλ5797, 6379, and 6614 diffuse interstellar bands as a tool to constrain carrier sizes (2022)
Journal Article
MacIsaac, H., Cami, J., Cox, N. L., Farhang, A., Smoker, J., Elyajouri, M., …Smith, K. T. (2022). The EDIBLES survey V: Line profile variations in the λλ5797, 6379, and 6614 diffuse interstellar bands as a tool to constrain carrier sizes. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202142225

Context. Several diffuse interstellar bands (DIBs) have profiles with resolved sub-peaks that resemble rotational bands of large molecules. Analysis of these profiles can constrain the sizes and geometries of the DIB carriers, especially if the profi... Read More about The EDIBLES survey V: Line profile variations in the λλ5797, 6379, and 6614 diffuse interstellar bands as a tool to constrain carrier sizes.

The VMC survey – XLVIII. Classical cepheids unveil the 3D geometry of the LMC (2022)
Journal Article
Van Loon. (2022). The VMC survey – XLVIII. Classical cepheids unveil the 3D geometry of the LMC. Monthly Notices of the Royal Astronomical Society, 563 - 582. https://doi.org/10.1093/mnras/stac595

We employed the VISTA near-infrared YJK(s) survey of the Magellanic System (VMC) to analyse the Y, J, and K-s light curves of delta Cepheid stars (DCEPs) in the Large Magellanic Cloud (LMC). Our sample consists of 4408 objects accounting for 97 per c... Read More about The VMC survey – XLVIII. Classical cepheids unveil the 3D geometry of the LMC.

The VMC survey – XLVII. Turbulence-controlled hierarchical star formation in the Large Magellanic Cloud (2022)
Journal Article
Miller, A. E., Cioni, M. L., de Grijs, R., Sun, N., Bell, C. P. M., Choudhury, S., …Van Loon, J. T. (2022). The VMC survey – XLVII. Turbulence-controlled hierarchical star formation in the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 512(1), 1196-1213. https://doi.org/10.1093/mnras/stac508

We perform a statistical clustering analysis of upper main-sequence stars in the Large Magellanic Cloud (LMC) using data from the Visible and Infrared Survey Telescope for Astronomy survey of the Magellanic Clouds. We map over 2500 young stellar stru... Read More about The VMC survey – XLVII. Turbulence-controlled hierarchical star formation in the Large Magellanic Cloud.

Evolutionary map of the Universe (EMU): 18-cm OH-maser discovery in ASKAP continuum images of the SCORPIO field (2022)
Journal Article
Ingallinera, A., Cavallaro, F., Loru, S., Marvil, J., Umana, G., Trigilio, C., …Van Loon, J. T. (2022). Evolutionary map of the Universe (EMU): 18-cm OH-maser discovery in ASKAP continuum images of the SCORPIO field. Monthly Notices of the Royal Astronomical Society: Letters, 512(1), L21-L26. https://doi.org/10.1093/mnrasl/slac017

Low- and intermediate-mass stars end their life dispersing their outer layers into the circumstellar medium, during the asymptotic and post-asymptotic giant branch phases. OH masers at 18 cm offer an effective way to probe their circumstellar environ... Read More about Evolutionary map of the Universe (EMU): 18-cm OH-maser discovery in ASKAP continuum images of the SCORPIO field.

GASKAP-HI pilot survey science I: ASKAP zoom observations of Hi emission in the Small Magellanic Cloud (2022)
Journal Article
Van Loon. (2022). GASKAP-HI pilot survey science I: ASKAP zoom observations of Hi emission in the Small Magellanic Cloud. Publications of the Astronomical Society of Australia, https://doi.org/10.1017/pasa.2021.59

We present the most sensitive and detailed view of the neutral hydrogen (HI) emission associated with the Small Magellanic Cloud (SMC), through the combination of data from the Australian Square Kilometre Array Pathfinder (ASKAP) and Parkes (Murriyan... Read More about GASKAP-HI pilot survey science I: ASKAP zoom observations of Hi emission in the Small Magellanic Cloud.

GASKAP Pilot Survey Science. II. ASKAP Zoom Observations of Galactic 21 cm Absorption (2022)
Journal Article
Van Loon. (2022). GASKAP Pilot Survey Science. II. ASKAP Zoom Observations of Galactic 21 cm Absorption. Astrophysical Journal, https://doi.org/10.3847/1538-4357/ac3a89

Using the Australian Square Kilometre Array Pathfinder to measure 21 cm absorption spectra toward continuum background sources, we study the cool phase of the neutral atomic gas in the far outer disk, and in the inner Galaxy near the end of the Galac... Read More about GASKAP Pilot Survey Science. II. ASKAP Zoom Observations of Galactic 21 cm Absorption.

The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. II. The Star-formation History of Andromeda I Derived from Long-period Variables (2021)
Journal Article
Van Loon. (2021). The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. II. The Star-formation History of Andromeda I Derived from Long-period Variables. Astrophysical Journal, https://doi.org/10.3847/1538-4357/ac2d96

An optical monitoring survey in the nearby dwarf galaxies was carried out with the 2.5 m Isaac Newton Telescope. 55 dwarf galaxies and four isolated globular clusters in the Local Group were observed with the Wide Field Camera. The main aims of this... Read More about The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. II. The Star-formation History of Andromeda I Derived from Long-period Variables.

Families and clusters of diffuse interstellar bands: a data-driven correlation analysis (2021)
Journal Article
Van Loon. (2021). Families and clusters of diffuse interstellar bands: a data-driven correlation analysis. Monthly Notices of the Royal Astronomical Society, 3546 - 3560. https://doi.org/10.1093/mnras/stab3651

More than 500 diffuse interstellar bands (DIBs) have been observed in astronomical spectra, and their signatures and correlations in different environments have been studied over the past decades to reveal clues about the nature of the carriers. We c... Read More about Families and clusters of diffuse interstellar bands: a data-driven correlation analysis.

Presence of red giant population in the foreground stellar substructure of the Small Magellanic Cloud (2021)
Journal Article
Van Loon. (2021). Presence of red giant population in the foreground stellar substructure of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 5854 - 5863. https://doi.org/10.1093/mnras/stab2873

ABSTRACT The eastern region of the Small Magellanic Cloud (SMC) is found to have a foreground stellar substructure, which is identified as a distance bimodality (~12?kpc apart) in the previous studies using red clump (RC) stars. Interestingly, studie... Read More about Presence of red giant population in the foreground stellar substructure of the Small Magellanic Cloud.

Radio continuum sources behind the Large Magellanic Cloud (2021)
Journal Article
Van Loon. (2021). Radio continuum sources behind the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 2885 - 2904. https://doi.org/10.1093/mnras/stab2249

We present a comprehensive multifrequency catalogue of radio sources behind the Large Magellanic Cloud (LMC) between 0.2 and 20 GHz, gathered from a combination of new and legacy radio continuum surveys. This catalogue covers an area of ~144 deg2 at... Read More about Radio continuum sources behind the Large Magellanic Cloud.

The first detection of deuterated water toward extragalactic hot cores with ALMA (2021)
Journal Article
Sewiło, M., Karska, A., Kristensen, L. E., Charnley, S. B., Chen, C. R., Oliveira, J. M., …Garcia-Berrios, E. (2021). The first detection of deuterated water toward extragalactic hot cores with ALMA. Proceedings of the International Astronomical Union, 17(S373), 21-24. https://doi.org/10.1017/s1743921322004252

We discuss the first detection of deuterated water (HDO) in extragalactic hot cores. The HDO 211–212 line has been detected with the Atacama Large Millimeter/submillimeter Array (ALMA) toward hot cores N 105–2 A and 2 B in the N 105 star-forming regi... Read More about The first detection of deuterated water toward extragalactic hot cores with ALMA.

The VMC survey – XLIV: Mapping metallicity trends in the large magellanic cloud using near-infrared passbands (2021)
Journal Article
Choudhury, S., de Grijs, R., Bekki, K., Cioni, M. L., Ivanov, V. D., Van Loon, J. T., …Subramanian, S. (2021). The VMC survey – XLIV: Mapping metallicity trends in the large magellanic cloud using near-infrared passbands. Monthly Notices of the Royal Astronomical Society, 507(4), 4752-4763. https://doi.org/10.1093/mnras/stab2446

We have derived high-spatial-resolution metallicity maps covering ~105 deg2 across the Large Magellanic Cloud (LMC) using near-infrared passbands from the VISTA Survey of the Magellanic Clouds. We attempt to understand the metallicity distribution an... Read More about The VMC survey – XLIV: Mapping metallicity trends in the large magellanic cloud using near-infrared passbands.

The VMC survey - XLIII. The spatially resolved star formation history across the Large Magellanic Cloud (2021)
Journal Article
Mazzi, A., Girardi, L., Zaggia, S., Pastorelli, G., Rubele, S., Bressan, A., …Van Loon, J. T. (2021). The VMC survey - XLIII. The spatially resolved star formation history across the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 508(1), 245 - 266

We derive the spatially resolved star formation history (SFH) for a 96 deg2 area across the main body of the Large Magellanic Cloud (LMC), using the near-infrared photometry from the VISTA survey of the Magellanic Clouds (VMC). The data and analyses... Read More about The VMC survey - XLIII. The spatially resolved star formation history across the Large Magellanic Cloud.

Massive young stellar objects in the Local Group irregular galaxy NGC6822 identified using machine learning (2021)
Journal Article
Kinson, D. A., Oliveira, J., & Van Loon, J. (2021). Massive young stellar objects in the Local Group irregular galaxy NGC6822 identified using machine learning. Monthly Notices of the Royal Astronomical Society, 507(4), 5106 - 5131. https://doi.org/10.1093/mnras/stab2386

We present a supervised machine learning methodology to classify stellar populations in the Local Group dwarf-irregular galaxy NGC?6822. Near-IR colours (J - H, H - K, and J - K), K-band magnitudes and far-IR surface brightness (at 70 and 160?µm) mea... Read More about Massive young stellar objects in the Local Group irregular galaxy NGC6822 identified using machine learning.

Dust Production around Carbon-Rich Stars: The Role of Metallicity (2021)
Journal Article
Nanni, A., Cristallo, S., van Loon, J., & Groenewegen, M. (in press). Dust Production around Carbon-Rich Stars: The Role of Metallicity. Universe, 7(7), 233. https://doi.org/10.3390/universe7070233

Background: Most of the stars in the Universe will end their evolution by losing their envelope during the thermally pulsing asymptotic giant branch (TP-AGB) phase, enriching the interstellar medium of galaxies with heavy elements, partially condense... Read More about Dust Production around Carbon-Rich Stars: The Role of Metallicity.

The ASKAP-EMU Early Science Project: 888 MHz radio continuum survey of the Large Magellanic Cloud (2021)
Journal Article
Pennock, C. M., Van Loon, J. T., Filipović, M. D., Andernach, H., Haberl, F., Kothes, R., …Vardoulaki, E. (2021). The ASKAP-EMU Early Science Project: 888 MHz radio continuum survey of the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 506(3), 3540 - 3559. https://doi.org/10.1093/mnras/stab1858

We present an analysis of a new 120 deg2 radio continuum image of the Large Magellanic Cloud (LMC) at 888 MHz with a bandwidth of 288 MHz and beam size of 13${_{.}^{\prime\prime}}$9 × 12${_{.}^{\prime\prime}}$1 from the Australian Square Kilometre Ar... Read More about The ASKAP-EMU Early Science Project: 888 MHz radio continuum survey of the Large Magellanic Cloud.

Massive stars in extremely metal-poor galaxies: a window into the past (2021)
Journal Article
Garcia, M., Evans, C. J., Bestenlehner, J. M., Bouret, J. C., Castro, N., Cervino, M., …Wofford, A. (2021). Massive stars in extremely metal-poor galaxies: a window into the past. Experimental Astronomy, 51(3), 887-911. https://doi.org/10.1007/s10686-021-09785-x

Cosmic history has witnessed the lives and deaths of multiple generations of massive stars, all of them invigorating their host galaxies with ionizing photons, kinetic energy, fresh material, and stellar-mass black holes. Ubiquitous engines as they a... Read More about Massive stars in extremely metal-poor galaxies: a window into the past.

The VMC Survey – XL. Three-dimensional structure of the Small Magellanic Cloud as derived from red clump stars (2021)
Journal Article
Tatton, B. L., Van Loon, J. T., Cioni, M. L., Bekki, K., Bell, C. P. M., Choudhury, S., …Sun, N. (2021). The VMC Survey – XL. Three-dimensional structure of the Small Magellanic Cloud as derived from red clump stars. Monthly Notices of the Royal Astronomical Society, 504(2), 2983 - 2997. https://doi.org/10.1093/mnras/staa3857

Galaxy interactions distort the distribution of baryonic matter and can affect star formation. The nearby Magellanic Clouds are a prime example of an ongoing galaxy interaction process. Here, we use the intermediate-age (similar to 1-10 Gyr) red clum... Read More about The VMC Survey – XL. Three-dimensional structure of the Small Magellanic Cloud as derived from red clump stars.

Stellar substructures in the periphery of the magellanic clouds with the VISTA hemisphere survey from the red clump and other tracers (2021)
Journal Article
El Youssoufi, D., Cioni, M. L., Bell, C. P. M., de Grijs, R., Groenewegen, M. A. T., Ivanov, V. D., …Van Loon, J. T. (2021). Stellar substructures in the periphery of the magellanic clouds with the VISTA hemisphere survey from the red clump and other tracers. Monthly Notices of the Royal Astronomical Society, 505(2), 2020-2038. https://doi.org/10.1093/mnras/stab1075

We study the morphology of the stellar periphery of the Magellanic Clouds in search of substructure using near–infrared imaging data from the VISTA Hemisphere Survey (VHS). Based on the selection of different stellar populations using the (J - Ks, Ks... Read More about Stellar substructures in the periphery of the magellanic clouds with the VISTA hemisphere survey from the red clump and other tracers.

The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. IV. The Star Formation History of Andromeda VII Derived from Long-period Variable Stars (2021)
Journal Article
Van Loon. (2021). The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. IV. The Star Formation History of Andromeda VII Derived from Long-period Variable Stars. Astrophysical Journal, 127 - 127. https://doi.org/10.3847/1538-4357/abdec1

We have examined the star formation history (SFH) of Andromeda VII (And VII), the brightest and most massive dwarf spheroidal (dSph) satellite of the Andromeda galaxy (M31). Although M31 is surrounded by several dSph companions with old stellar popul... Read More about The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. IV. The Star Formation History of Andromeda VII Derived from Long-period Variable Stars.

The VMC Survey – XLII. Near-infrared period–luminosity relations for RR Lyrae stars and the structure of the Large Magellanic Cloud (2021)
Journal Article
Cusano, F., Moretti, M. I., Clementini, G., Ripepi, V., Marconi, M., Cioni, M. L., …Van Loon, J. T. (2021). The VMC Survey – XLII. Near-infrared period–luminosity relations for RR Lyrae stars and the structure of the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 504(1), 1 - 15. https://doi.org/10.1093/mnras/stab901

We present results from an analysis of ~29?000 RR Lyrae stars located in the Large Magellanic Cloud (LMC). For these objects, near-infrared time-series photometry from the VISTA survey of the Magellanic Clouds system (VMC) and optical data from the O... Read More about The VMC Survey – XLII. Near-infrared period–luminosity relations for RR Lyrae stars and the structure of the Large Magellanic Cloud.

Evolutionary map of the Universe (EMU): Compact radio sources in the scorpio field towards the galactic plane (2021)
Journal Article
Van Loon. (2021). Evolutionary map of the Universe (EMU): Compact radio sources in the scorpio field towards the galactic plane. Monthly Notices of the Royal Astronomical Society, 60 - 79. https://doi.org/10.1093/mnras/stab028

We present observations of a region of the Galactic plane taken during the Early Science Program of the Australian Square Kilometre Array Pathfinder (ASKAP). In this context, we observed the scorpio field at 912MHz with an uncompleted array consistin... Read More about Evolutionary map of the Universe (EMU): Compact radio sources in the scorpio field towards the galactic plane.

The VMC survey – XLI. Stellar proper motions within the Small Magellanic Cloud (2021)
Journal Article
Niederhofer, F., Cioni, M. L., Rubele, S., Schmidt, T., Diaz, J. D., Matijevĭc, G., …Van Loon, J. T. (2021). The VMC survey – XLI. Stellar proper motions within the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 2859 - 2878. https://doi.org/10.1093/mnras/stab206

We used data from the near-infrared Visible and Infrared Telescope for Astronomy (VISTA) survey of the Magellanic Cloud system (VMC) to measure proper motions (PMs) of stars within the Small Magellanic Cloud (SMC). The data analysed in this study com... Read More about The VMC survey – XLI. Stellar proper motions within the Small Magellanic Cloud.

Gaia view of a stellar sub-structure in front of the Small Magellanic Cloud (2021)
Journal Article
Van Loon. (2021). Gaia view of a stellar sub-structure in front of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 2757-2776. https://doi.org/10.1093/mnras/staa3085

Recent observational studies identified a foreground stellar sub-structure traced by red clump (RC) stars (~ 12 kpc in front of the main body) in the eastern regions of the Small Magellanic Cloud (SMC) and suggested that it formed during the formatio... Read More about Gaia view of a stellar sub-structure in front of the Small Magellanic Cloud.

The VMC survey XXXVIII. Proper motion of the Magellanic Bridge (2020)
Journal Article
Van Loon, & Oliveira. (2020). The VMC survey XXXVIII. Proper motion of the Magellanic Bridge. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/202037478

Context. The Magellanic Clouds are a nearby pair of interacting dwarf galaxies and satellites of the Milky Way. Studying their kinematic properties is essential to understanding their origin and dynamical evolution. They have prominent tidal features... Read More about The VMC survey XXXVIII. Proper motion of the Magellanic Bridge.

The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – II. The Small Magellanic Cloud (2020)
Journal Article
Bell, C. P. M., Cioni, M. L., Wright, A. H., Rubele, S., Nidever, D. L., Tatton, B. L., …Vivas, A. K. (2020). The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – II. The Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 499(1), 993 -1004. https://doi.org/10.1093/mnras/staa2786

We present a map of the total intrinsic reddening across ? 34 deg2 of the Small Magellanic Cloud (SMC) derived using optical (ugriz) and near-infrared (IR; YJKs) spectral energy distributions (SEDs) of background galaxies. The reddening map is create... Read More about The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – II. The Small Magellanic Cloud.

Constraining the thermally pulsing asymptotic giant branch phase with resolved stellar populations in the Large Magellanic Cloud (2020)
Journal Article
Van Loon. (2020). Constraining the thermally pulsing asymptotic giant branch phase with resolved stellar populations in the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 3283-3301. https://doi.org/10.1093/mnras/staa2565

Reliable models of the thermally pulsing asymptotic giant branch (TP-AGB) phase are of critical importance across astrophysics, including our interpretation of the spectral energy distribution of galaxies, cosmic dust production, and enrichment of th... Read More about Constraining the thermally pulsing asymptotic giant branch phase with resolved stellar populations in the Large Magellanic Cloud.

The VMC survey – XXXIX: Mapping metallicity trends in the Small Magellanic Cloud using near-infrared passbands (2020)
Journal Article
Choudhury, S., de Grijs, R., Rubele, S., Bekki, K., Cioni, M. L., Ivanov, V. D., …Ripepi, V. (2020). The VMC survey – XXXIX: Mapping metallicity trends in the Small Magellanic Cloud using near-infrared passbands. Monthly Notices of the Royal Astronomical Society, 497(3), 3746-3760. https://doi.org/10.1093/mnras/staa2140

We have derived high spatial resolution metallicity maps covering ~42 deg2 across the Small Magellanic Cloud (SMC) in an attempt to understand its metallicity distribution and gradients up to a radius of ~ 4?. Using the near-infrared VISTA Survey of... Read More about The VMC survey – XXXIX: Mapping metallicity trends in the Small Magellanic Cloud using near-infrared passbands.

The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. I. Survey Overview and First Results for Andromeda I (2020)
Journal Article
Saremi, E., Javadi, A., Van Loon, J., Khosroshahi, H., Molaeinezhad, A., McDonald, I., …Gozaliasl, G. (2020). The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. I. Survey Overview and First Results for Andromeda I. Astrophysical Journal, 894(2), Article ARTN 135. https://doi.org/10.3847/1538-4357/ab88a2

An optical monitoring survey in nearby dwarf galaxies was carried out with the 2.5 m Isaac Newton Telescope. Fifty-five dwarf galaxies and four isolated globular clusters in the Local Group were observed with the Wide Field Camera. The main aims of t... Read More about The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. I. Survey Overview and First Results for Andromeda I.

The VMC Survey - XXXVII. Pulsation periods of dust-enshrouded AGB stars in the Magellanic Clouds (2020)
Journal Article
Groenewegen, M. A. T., Nanni, A., Cioni, M. L., Girardi, L., de Grijs, R., Ivanov, V. D., …Van Loon, J. T. (2020). The VMC Survey - XXXVII. Pulsation periods of dust-enshrouded AGB stars in the Magellanic Clouds. Astronomy and Astrophysics, 636, Article A48. https://doi.org/10.1051/0004-6361/201937271

Context. Variability is a key property of stars on the asymptotic giant branch (AGB). Their pulsation period is related to the luminosity and mass-loss rate of the star. Long-period variables (LPVs) and Mira variables are the most prominent of all ty... Read More about The VMC Survey - XXXVII. Pulsation periods of dust-enshrouded AGB stars in the Magellanic Clouds.

The VMC survey – XXXVI. Young stellar variability in the Large Magellanic Cloud (2020)
Journal Article
Zivkov, V., Oliveira, J. M., Petr-Gotzens, M. G., Rubele, S., Cioni, M. L., Van Loon, J. T., …Sun, N. (2020). The VMC survey – XXXVI. Young stellar variability in the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 494(1), 458 -486. https://doi.org/10.1093/mnras/staa626

Studies of young stellar objects (YSOs) in the Galaxy have found that a significant fraction exhibits photometric variability. However, no systematic investigation has been conducted on the variability of extragalactic YSOs. Here we present the first... Read More about The VMC survey – XXXVI. Young stellar variability in the Large Magellanic Cloud.

A new mass-loss rate prescription for red supergiants (2020)
Journal Article
Beasor, E. R., Davies, B., Smith, N., Van Loon, J. T., Gehrz, R. D., & Figer, D. F. (2020). A new mass-loss rate prescription for red supergiants. Monthly Notices of the Royal Astronomical Society, 492(4), 5994 - 6006. https://doi.org/10.1093/mnras/staa255

Evolutionary models have shown the substantial effect that strong mass-loss rates ($\dotM$s) can have on the fate of massive stars. Red supergiant (RSG) mass-loss is poorly understood theoretically, and so stellar models rely on purely empirical $\do... Read More about A new mass-loss rate prescription for red supergiants.

High Angular Resolution ALMA Images of Dust and Molecules in the SN 1987A Ejecta (2019)
Journal Article
Van Loon. (2019). High Angular Resolution ALMA Images of Dust and Molecules in the SN 1987A Ejecta. Astrophysical Journal, https://doi.org/10.3847/1538-4357/ab4b46

We present high angular resolution (similar to 80 mas) ALMA continuum images of the SN.1987A system, together with CO J = 2 -> 1, J = 6 -> 5, and SiO J = 5 -> 4 to J = 7 -> 6 images, which clearly resolve the ejecta (dust continuum and molecules) and... Read More about High Angular Resolution ALMA Images of Dust and Molecules in the SN 1987A Ejecta.

The nearby evolved stars survey – I. JCMT/SCUBA-2 submillimetre detection of the detached shell of U Antliae (2019)
Journal Article
van Loon, J. T. (2019). The nearby evolved stars survey – I. JCMT/SCUBA-2 submillimetre detection of the detached shell of U Antliae. Monthly Notices of the Royal Astronomical Society, 3218 -3231. https://doi.org/10.1093/mnras/stz2334

We present the highest resolution single-dish submillimetre observations of the detached shell source U Antliae to date. The observations were obtained at $450$ and $850\,µ\rm m$ with SCUBA-2 instrument on the James Clerk Maxwell Telescope as part of... Read More about The nearby evolved stars survey – I. JCMT/SCUBA-2 submillimetre detection of the detached shell of U Antliae.

Asymptotic Giant Branch Stars in the Nearby Dwarf Galaxy Leo P (2019)
Journal Article
Van Loon. (2019). Asymptotic Giant Branch Stars in the Nearby Dwarf Galaxy Leo P. Astrophysical Journal, https://doi.org/10.3847/1538-4357/ab418a

We have conducted a highly sensitive census of the evolved-star population in the metal-poor dwarf galaxy Leo P and detected four asymptotic giant branch (AGB) star candidates. Leo P is one of the best examples of a nearby analog of high-redshift gal... Read More about Asymptotic Giant Branch Stars in the Nearby Dwarf Galaxy Leo P.

Complex Organic Molecules in Star-Forming Regions of the Magellanic Clouds (2019)
Journal Article
Sewiło, M., Charnley, S. B., Schilke, P., Taquet, V., Oliveira, J. M., Shimonishi, T., …Hamedani Golshan, R. (2019). Complex Organic Molecules in Star-Forming Regions of the Magellanic Clouds. ACS Earth and Space Chemistry, 3(10), 2088-2109. https://doi.org/10.1021/acsearthspacechem.9b00065

The Large and Small Magellanic Clouds (LMC and SMC), gas-rich dwarf companions of the Milky Way, are the nearest laboratories for detailed studies on the formation and survival of complex organic molecules (COMs) under metal-poor conditions. To date,... Read More about Complex Organic Molecules in Star-Forming Regions of the Magellanic Clouds.

The VMC Survey - XXXV. Model fitting of LMC Cepheid light curves (2019)
Journal Article
Ragosta, F., Marconi, M., Molinaro, R., Ripepi, V., Cioni, M. R. L., Ida Moretti, M., …Gonzalez-Fernandez, C. (2019). The VMC Survey - XXXV. Model fitting of LMC Cepheid light curves. Monthly Notices of the Royal Astronomical Society, 490(4), 4975-4984. https://doi.org/10.1093/mnras/stz2881

We present the results of the light curve model fitting technique applied to optical and near-infrared photometric data for a sample of 18 Classical Cepheids (11 fundamentals and 7 first overtones) in the Large Magellanic Cloud (LMC). We use optical... Read More about The VMC Survey - XXXV. Model fitting of LMC Cepheid light curves.

Herschel spectroscopy of Massive Young Stellar Objects in the Magellanic Clouds (2019)
Journal Article
Oliveira, J., Van Loon, J. T., Sewilo, M., Lee, M., Lebouteiller, V., Chen, C. R., …Fukui, Y. (2019). Herschel spectroscopy of Massive Young Stellar Objects in the Magellanic Clouds. Monthly Notices of the Royal Astronomical Society, 490(3), 3903-3935. https://doi.org/10.1093/mnras/stz2810

We present Herschel Space Observatory Photodetector Array Camera and Spectrometer (PACS) and Spectral and Photometric Imaging Receiver Fourier Transform Spectrometer (SPIRE FTS) spectroscopy of a sample of twenty massive Young Stellar Objects (YSOs)... Read More about Herschel spectroscopy of Massive Young Stellar Objects in the Magellanic Clouds.

A three-dimensional map of the hot Local Bubble using diffuse interstellar bands (2019)
Journal Article
Van Loon. (2019). A three-dimensional map of the hot Local Bubble using diffuse interstellar bands. Nature Astronomy, 922 - 927. https://doi.org/10.1038/s41550-019-0814-z

The Solar System is located within a low-density cavity known as the Local Bubble1–3, which appears to be filled with an X-ray-emitting gas at a temperature of 106?K (ref. 4). Such conditions are too harsh for typical interstellar atoms and molecules... Read More about A three-dimensional map of the hot Local Bubble using diffuse interstellar bands.

The ASKAP-EMU Early Science Project: Radio Continuum Survey of the Small Magellanic Cloud (2019)
Journal Article
Joseph, T. D., Filipović, M. D., Crawford, E. J., Bojičić, I., Alexander, E. L., Wong, G. F., …Grieve, K. R. (2019). The ASKAP-EMU Early Science Project: Radio Continuum Survey of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 490(1), 1202-1219. https://doi.org/10.1093/mnras/stz2650

We present two new radio continuum images from the Australian Square Kilometre Array Pathfinder (ASKAP) survey in the direction of the Small Magellanic Cloud (SMC). These images are part of the Evolutionary Map of the Universe (EMU) Early Science Pro... Read More about The ASKAP-EMU Early Science Project: Radio Continuum Survey of the Small Magellanic Cloud.

The VMC Survey - XXXIV. Morphology of Stellar Populations in the Magellanic Clouds (2019)
Journal Article
El Youssoufi, D., Cioni, M. L., Bell, C. P. M., Rubele, S., Bekki, K., de Grijs, R., …Van Loon, J. T. (2019). The VMC Survey - XXXIV. Morphology of Stellar Populations in the Magellanic Clouds. Monthly Notices of the Royal Astronomical Society, 490(1), 1076-1093. https://doi.org/10.1093/mnras/stz2400

The Magellanic Clouds are nearby dwarf irregular galaxies whose morphologies show different properties when traced by different stellar populations, making them an important laboratory for studying galaxy morphologies. We study the morphology of the... Read More about The VMC Survey - XXXIV. Morphology of Stellar Populations in the Magellanic Clouds.

The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – I. The bar and outskirts of the Small Magellanic Cloud (2019)
Journal Article
Bell, C. P. M., Cioni, M. L., Wright, A. H., Rubele, S., Nidever, D. L., Tatton, B. L., …Muñoz, R. R. (2019). The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – I. The bar and outskirts of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 3200 -3217. https://doi.org/10.1093/mnras/stz2325

We present a method to map the total intrinsic reddening of a foreground extinguishing medium via the analysis of spectral energy distributions (SEDs) of background galaxies. In this pilot study, we implement this technique in two distinct regions of... Read More about The intrinsic reddening of the Magellanic Clouds as traced by background galaxies – I. The bar and outskirts of the Small Magellanic Cloud.

The mass-loss, expansion velocities and dust production rates of carbon stars in the Magellanic Clouds (2019)
Journal Article
Van Loon. (2019). The mass-loss, expansion velocities and dust production rates of carbon stars in the Magellanic Clouds. Monthly Notices of the Royal Astronomical Society, 502-521. https://doi.org/10.1093/mnras/stz1255

The properties of carbon stars in the Magellanic Clouds (MCs) and their total dust production rates are predicted by fitting their spectral energy distributions (SED) over pre-computed grids of spectra reprocessed by dust. The grids are calculated as... Read More about The mass-loss, expansion velocities and dust production rates of carbon stars in the Magellanic Clouds.

Identification of Herbig Ae/Be Stars in the Small Magellanic Cloud (2019)
Journal Article
Keller, L. D., Sloan, G., Oliveira, J. M., Kraemer, K. E., Van Loon, J. T., Wood, P. R., …Knapp, T. (2019). Identification of Herbig Ae/Be Stars in the Small Magellanic Cloud. Astrophysical Journal, 878(2), 147 -147. https://doi.org/10.3847/1538-4357/ab204a

Protoplanetary disks orbiting intermediate-mass stars, Herbig Ae/Be stars, that have formed in a metal-poor environment may evolve differently than their Galactic cousins. A study of the planet-formation process in such an environment requires identi... Read More about Identification of Herbig Ae/Be Stars in the Small Magellanic Cloud.

An Infrared Census of DUST in Nearby Galaxies with Spitzer (DUSTiNGS). V. The Period-Luminosity Relation for Dusty Metal-poor AGB Stars (2019)
Journal Article
Van Loon. (2019). An Infrared Census of DUST in Nearby Galaxies with Spitzer (DUSTiNGS). V. The Period-Luminosity Relation for Dusty Metal-poor AGB Stars. Astrophysical Journal, https://doi.org/10.3847/1538-4357/ab0965

The survey for DUST in Nearby Galaxies with Spitzer (DUSTiNGS) has identified hundreds of candidate dust-producing asymptotic giant branch (AGB) stars in several nearby metal-poor galaxies. We have obtained multi-epoch follow-up observations for thes... Read More about An Infrared Census of DUST in Nearby Galaxies with Spitzer (DUSTiNGS). V. The Period-Luminosity Relation for Dusty Metal-poor AGB Stars.

The VLT-FLAMES Tarantula Survey - XXX. Red stragglers in the clusters Hodge 301 and SL 639 (2019)
Journal Article
Van Loon. (2019). The VLT-FLAMES Tarantula Survey - XXX. Red stragglers in the clusters Hodge 301 and SL 639. Astronomy and Astrophysics, A128 - A128. https://doi.org/10.1051/0004-6361/201834564

Aims. We estimate physical parameters for the late-type massive stars observed as part of the VLT-FLAMES Tarantula Survey (VFTS) in the 30 Doradus region of the Large Magellanic Cloud (LMC). Methods. The observational sample comprises 20 candidate re... Read More about The VLT-FLAMES Tarantula Survey - XXX. Red stragglers in the clusters Hodge 301 and SL 639.

The VLT-FLAMES Tarantula Survey - XXXI. Radial velocities and multiplicity constraints of red supergiant stars in 30 Doradus (2019)
Journal Article
Van Loon. (2019). The VLT-FLAMES Tarantula Survey - XXXI. Radial velocities and multiplicity constraints of red supergiant stars in 30 Doradus. Astronomy and Astrophysics, A129 - A129. https://doi.org/10.1051/0004-6361/201834951

Aims. The incidence of multiplicity in cool, luminous massive stars is relatively unknown compared to their hotter counterparts. In this work we present radial velocity (RV) measurements and investigate the multiplicity properties of red supergiants... Read More about The VLT-FLAMES Tarantula Survey - XXXI. Radial velocities and multiplicity constraints of red supergiant stars in 30 Doradus.

From evolved stars to the evolution of IC 1613 (2019)
Journal Article
Van Loon. (2019). From evolved stars to the evolution of IC 1613. Monthly Notices of the Royal Astronomical Society, 4751 -4765. https://doi.org/10.1093/mnras/sty3450

IC 1613 is a Local Group dwarf irregular galaxy at a distance of 750 kpc. In this work, we present an analysis of the star formation history (SFH) of a field of ~200 arcmin2 in the central part of the galaxy. To this aim, we use a novel method based... Read More about From evolved stars to the evolution of IC 1613.

The VMC Survey XXXIII. The tip of the red giant branch in the Magellanic Clouds (2019)
Journal Article
Van Loon. (2019). The VMC Survey XXXIII. The tip of the red giant branch in the Magellanic Clouds. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201833904

In this paper JKs-band data from the VISTA Magellanic Cloud (VMC) survey are used to investigate the tip of the red giant branch (TRGB) as a distance indicator. A linear fit to recent theoretical models is used as the basis for the absolute calibrati... Read More about The VMC Survey XXXIII. The tip of the red giant branch in the Magellanic Clouds.

Identification of AGN in the XMM-Newton X-ray survey of the SMC (2019)
Journal Article
Maitra, C., Haberl, F., Ivanov, V. D., Cioni, M. L., & Van Loon, J. T. (2019). Identification of AGN in the XMM-Newton X-ray survey of the SMC. Astronomy & Astrophysics, 622, Article A29. https://doi.org/10.1051/0004-6361/201833663

Context Finding Active Galactic Nuclei (AGN) behind the Magellanic Clouds (MCs) is difficult because of the high stellar density in these fields. Although the first AGN behind the Small Magellanic Cloud (SMC) were reported in the 1980s, it is only r... Read More about Identification of AGN in the XMM-Newton X-ray survey of the SMC.

The VMC Survey. XXXII. Pre-main-sequence populations in the Large Magellanic Cloud (2018)
Journal Article
Van Loon, J., & Oliveira, J. (2018). The VMC Survey. XXXII. Pre-main-sequence populations in the Large Magellanic Cloud. Astronomy and Astrophysics Supplement Series, https://doi.org/10.1051/0004-6361/201833951

Context Detailed studies of intermediate- and low-mass pre-main-sequence (PMS) stars outside the Galaxy have so far been conducted only for small targeted regions harbouring known star formation complexes. The VISTA Survey of the Magellanic Clouds (... Read More about The VMC Survey. XXXII. Pre-main-sequence populations in the Large Magellanic Cloud.

X-ray powder diffraction study of the stability of clathrate hydrates in the presence of salts with relevance to the Martian cryosphere (2018)
Journal Article
Safi, E., Thompson, S. P., Evans, A., Day, S. J., Murray, C. A., Baker, A. R., …Van Loon, J. T. (2019). X-ray powder diffraction study of the stability of clathrate hydrates in the presence of salts with relevance to the Martian cryosphere. Geochimica et Cosmochimica Acta, 245, 304-315. https://doi.org/10.1016/j.gca.2018.10.034

Water on the present day Martian surface is thought to exist in two thermally distinct sub-surface reservoirs: as ice in the cryosphere and as groundwater located deeper in the crust. These sub-surface environments are thought to contain saline, rath... Read More about X-ray powder diffraction study of the stability of clathrate hydrates in the presence of salts with relevance to the Martian cryosphere.

The VLT-FLAMES Tarantula Survey. XXIX. Massive star formation in the local 30 Doradus starburst (2018)
Journal Article
Van Loon. (2018). The VLT-FLAMES Tarantula Survey. XXIX. Massive star formation in the local 30 Doradus starburst. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201833433

The 30 Doradus (30 Dor) nebula in the Large Magellanic Cloud (LMC) is the brightest HII region in the Local Group and a prototype starburst similar to those found in high redshift galaxies. It is thus a stepping stone to understand the complex format... Read More about The VLT-FLAMES Tarantula Survey. XXIX. Massive star formation in the local 30 Doradus starburst.

The 30 Year Search for the Compact Object in SN 1987A (2018)
Journal Article
Alp, D., Larsson, J., Fransson, C., Indebetouw, R., Jerkstrand, A., Ahola, A., …Staveley-Smith, L. (2018). The 30 Year Search for the Compact Object in SN 1987A. Astrophysical Journal, 174 -174. https://doi.org/10.3847/1538-4357/aad739

Despite more than 30 years of searching, the compact object in Supernova (SN) 1987A has not yet been detected. We present new limits on the compact object in SN 1987A using millimeter, near-infrared, optical, ultraviolet, and X-ray observations from... Read More about The 30 Year Search for the Compact Object in SN 1987A.

ALMA Observations of Supernova Remnant N49 in the LMC. I. Discovery of CO Clumps Associated with X-Ray and Radio Continuum Shells (2018)
Journal Article
Van Loon. (2018). ALMA Observations of Supernova Remnant N49 in the LMC. I. Discovery of CO Clumps Associated with X-Ray and Radio Continuum Shells. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aacfff

N49 (LHA 120-N49) is a bright X-ray supernova remnant (SNR) in the Large Magellanic Cloud. We present new 12CO (J = 1–0, 3–2), H i, and 1.4 GHz radio continuum observations of the SNR N49 using Mopra, ASTE, ALMA, and ATCA. We have newly identified th... Read More about ALMA Observations of Supernova Remnant N49 in the LMC. I. Discovery of CO Clumps Associated with X-Ray and Radio Continuum Shells.

Response to Comment on “An excess of massive stars in the local 30 Doradus starburst” (2018)
Journal Article
Schneider, F. R. N., Sana, H., Evans, C. J., Bestenlehner, J. M., Castro, N., Fossati, L., …Norman, C. (2018). Response to Comment on “An excess of massive stars in the local 30 Doradus starburst”. Science, 361(6400), https://doi.org/10.1126/science.aat7032

Farr and Mandel reanalyze our data, finding initial mass function slopes for high-mass stars in 30 Doradus that agree with our results. However, their reanalysis appears to underpredict the observed number of massive stars. Their technique results in... Read More about Response to Comment on “An excess of massive stars in the local 30 Doradus starburst”.

The VMC survey – XXXI. The spatially resolved star formation history of the main body of the Small Magellanic Cloud (2018)
Journal Article
Rubele, S., Pastorelli, G., Girardi, L., Cioni, M. L., Zaggia, S., Marigo, P., …Van Loon, J. T. (2018). The VMC survey – XXXI. The spatially resolved star formation history of the main body of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 478(4), 5017-5036. https://doi.org/10.1093/mnras/sty1279

We recover the spatially resolved star formation history across the entire main body and Wing of the Small Magellanic Cloud (SMC), using 14 deep tile images from the VISTA survey of the Magellanic Clouds (VMC) in the YJKs filters. The analysis is per... Read More about The VMC survey – XXXI. The spatially resolved star formation history of the main body of the Small Magellanic Cloud.

XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud (2018)
Journal Article
Niederhofer, F., Cioni, M., Rubele, S., Schmidt, T., Bekki, K., de Grijs, R., …Zaggia, S. (2018). XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud. Astronomy and Astrophysics, 613, Article L8. https://doi.org/10.1051/0004-6361/201833144

We present the first spatially resolved map of stellar proper motions within the central (similar to 3.1 x 2.4 kpc) regions of the Small Magellanic Cloud (SMC). The data used for this study encompasses four tiles from the ongoing near-infrared VISTA... Read More about XXX. Stellar proper motions in the central parts of the Small Magellanic Cloud.

The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae (2018)
Journal Article
Van Loon, J., & Oliveira, J. (2018). The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201732144

We use deep multi-epoch point-spread function (PSF) photometry taken with the Visible and Infrared Survey Telescope for Astronomy (VISTA) to measure and analyze the proper motions of stars within the Galactic globular cluster 47 Tucanae (47 Tuc, NGC... Read More about The VMC survey XXVIII. Improved measurements of the proper motion of the Galactic globular cluster 47 Tucanae.

The VMC Survey. XXIX. Turbulence-controlled Hierarchical Star Formation in the Small Magellanic Cloud (2018)
Journal Article
Van Loon, J., & Oliveira, J. (2018). The VMC Survey. XXIX. Turbulence-controlled Hierarchical Star Formation in the Small Magellanic Cloud. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aabc50

In this paper we report a clustering analysis of upper main-sequence stars in the Small Magellanic Cloud, using data from the VMC survey (the VISTA near-infrared YJK s survey of the Magellanic system). Young stellar structures are identified as surfa... Read More about The VMC Survey. XXIX. Turbulence-controlled Hierarchical Star Formation in the Small Magellanic Cloud.

The Detection of Hot Cores and Complex Organic Molecules in the Large Magellanic Cloud (2018)
Journal Article
Sewiło, M., Indebetouw, R., Charnley, S. B., Zahorecz, S., Oliveira, J. M., Van Loon, J. T., …Schilke, P. (2018). The Detection of Hot Cores and Complex Organic Molecules in the Large Magellanic Cloud. Astrophysical Journal Letters, 853(2), L19 -?. https://doi.org/10.3847/2041-8213/aaa079

We report the first extragalactic detection of the complex organic molecules (COMs) dimethyl ether (CH3OCH3) and methyl formate (CH3OCHO) with the Atacama Large Millimeter/submillimeter Array (ALMA). These COMs, together with their parent species met... Read More about The Detection of Hot Cores and Complex Organic Molecules in the Large Magellanic Cloud.

First Results from the Herschel and ALMA Spectroscopic Surveys of the SMC: The Relationship between [C ii ]-bright Gas and CO-bright Gas at Low Metallicity (2018)
Journal Article
Van Loon. (2018). First Results from the Herschel and ALMA Spectroscopic Surveys of the SMC: The Relationship between [C ii ]-bright Gas and CO-bright Gas at Low Metallicity. Astrophysical Journal, 111 - ?. https://doi.org/10.3847/1538-4357/aaa4bb

The Small Magellanic Cloud (SMC) provides the only laboratory to study the structure of molecular gas at high resolution and low metallicity. We present results from the Herschel Spectroscopic Survey of the SMC (HS3), which mapped the key far-IR cool... Read More about First Results from the Herschel and ALMA Spectroscopic Surveys of the SMC: The Relationship between [C ii ]-bright Gas and CO-bright Gas at Low Metallicity.

An excess of massive stars in the local 30 Doradus starburst (2018)
Journal Article
Schneider, F. R. N., Sana, H., Evans, C. J., Bestenlehner, J. M., Castro, N., Fossati, L., …Norman, C. (2018). An excess of massive stars in the local 30 Doradus starburst. Science, 359(6371), 69-71. https://doi.org/10.1126/science.aan0106

The 30 Doradus star-forming region in the Large Magellanic Cloud is a nearby analog of large star-formation events in the distant universe. We determined the recent formation history and the initial mass function (IMF) of massive stars in 30 Doradus... Read More about An excess of massive stars in the local 30 Doradus starburst.

The VMC survey - XXVI. Structure of the Small Magellanic Cloud from RR Lyrae stars (2018)
Journal Article
Van Loon. (2018). The VMC survey - XXVI. Structure of the Small Magellanic Cloud from RR Lyrae stars. Monthly Notices of the Royal Astronomical Society, 3131-3146. https://doi.org/10.1093/mnras/stx2514

We present results from the analysis of 2997 fundamental mode RR Lyrae variables located in the Small Magellanic Cloud (SMC). For these objects, near-infrared time series photometry from the VISTA survey of the Magellanic Clouds system (VMC) and visu... Read More about The VMC survey - XXVI. Structure of the Small Magellanic Cloud from RR Lyrae stars.

A dearth of OH/IR stars in the Small Magellanic Cloud (2018)
Journal Article
Goldman, S. R., Van Loon, J. T., Gómez, J. F., Green, J. A., Zijlstra, A. A., Nanni, A., …Oliveira, J. M. (2018). A dearth of OH/IR stars in the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 473(3), 3835-3853. https://doi.org/10.1093/mnras/stx2601

We present the results of targeted observations and a survey of 1612-, 1665-, and 1667-MHz circumstellar OH maser emission from asymptotic giant branch (AGB) stars and red supergiants (RSGs) in the Small Magellanic Cloud (SMC), using the Parkes and A... Read More about A dearth of OH/IR stars in the Small Magellanic Cloud.

An Infrared Census of DUST in Nearby Galaxies with Spitzer (DUSTiNGS). IV. Discovery of High-redshift AGB Analogs (2017)
Journal Article
Van Loon. (2017). An Infrared Census of DUST in Nearby Galaxies with Spitzer (DUSTiNGS). IV. Discovery of High-redshift AGB Analogs. Astrophysical Journal, https://doi.org/10.3847/1538-4357/aa9892

The survey for DUST in Nearby Galaxies with Spitzer (DUSTiNGS) identified several candidate Asymptotic Giant Branch (AGB) stars in nearby dwarf galaxies and showed that dust can form even in very metal-poor systems (${\boldsymbol{Z}}\sim 0.008\,{Z}_{... Read More about An Infrared Census of DUST in Nearby Galaxies with Spitzer (DUSTiNGS). IV. Discovery of High-redshift AGB Analogs.

The VMC Survey. XXVII. Young Stellar Structures in the LMC’s Bar Star-forming Complex (2017)
Journal Article
Van Loon, J., & Oliveira, J. (2017). The VMC Survey. XXVII. Young Stellar Structures in the LMC’s Bar Star-forming Complex. Astrophysical Journal, 149 -149. https://doi.org/10.3847/1538-4357/aa911e

Star formation is a hierarchical process, forming young stellar structures of star clusters, associations, and complexes over a wide range of scales. The star-forming complex in the bar region of the Large Magellanic Cloud is investigated with upper... Read More about The VMC Survey. XXVII. Young Stellar Structures in the LMC’s Bar Star-forming Complex.

The ESO Diffuse Interstellar Bands Large Exploration Survey (EDIBLES) - I. Project description, survey sample, and quality assessment (2017)
Journal Article
Van Loon. (2017). The ESO Diffuse Interstellar Bands Large Exploration Survey (EDIBLES) - I. Project description, survey sample, and quality assessment. Astronomy & Astrophysics, A76 -A76. https://doi.org/10.1051/0004-6361/201730912

The carriers of the diffuse interstellar bands (DIBs) are largely unidentified molecules ubiquitously present in the interstellar medium (ISM). After decades of study, two strong and possibly three weak near-infrared DIBs have recently been attribute... Read More about The ESO Diffuse Interstellar Bands Large Exploration Survey (EDIBLES) - I. Project description, survey sample, and quality assessment.

The VMC survey – XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids (2017)
Journal Article
Ripepi, V., Cioni, M. L., Ida Moretti, M., Marconi, M., Bekki, K., Clementini, G., …Van Loon, J. T. (2017). The VMC survey – XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids. Monthly Notices of the Royal Astronomical Society, 472(1), 808 -827. https://doi.org/10.1093/mnras/stx2096

The VISTA near-infrared YJKs survey of the Magellanic System (VMC) is collecting deep Ks-band time-series photometry of pulsating stars hosted by the two Magellanic Clouds and their connecting bridge. Here, we present Y, J, Ks light curves for a samp... Read More about The VMC survey – XXV. The 3D structure of the Small Magellanic Cloud from Classical Cepheids.

ALMA spectral survey of Supernova 1987A-molecular inventory, chemistry, dynamics and explosive nucleosynthesis (2017)
Journal Article
Van Loon. (2017). ALMA spectral survey of Supernova 1987A-molecular inventory, chemistry, dynamics and explosive nucleosynthesis. Monthly Notices of the Royal Astronomical Society, 3347 -3362. https://doi.org/10.1093/mnras/stx830

We report the first molecular line survey of Supernova 1987A in the millimetre wavelength range. In the Atacama Large Millimeter/submillimeter Array (ALMA) 210–300 and 340–360 GHz spectra, we detected cold (20–170 K) CO, 28SiO, HCO+ and SO, with weak... Read More about ALMA spectral survey of Supernova 1987A-molecular inventory, chemistry, dynamics and explosive nucleosynthesis.

Star formation histories in NGC 147 and NGC 185 (2017)
Journal Article
Van Loon. (2017). Star formation histories in NGC 147 and NGC 185. Journal of Physics: Conference Series, https://doi.org/10.1088/1742-6596/869/1/012087

NGC 147 and NGC 185 are two of the most massive satellites of the Andromeda galaxy (M 31). With similar mass and morphological type dE, they possess different amounts of interstellar gas and tidal distortion. The question therefore is, how do their h... Read More about Star formation histories in NGC 147 and NGC 185.

Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D (2017)
Journal Article
Abellán, F. J., Indebetouw, R., Marcaide, J. M., Gabler, M., Fransson, C., Spyromilio, J., …Woosley, S. E. (in press). Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D. Astrophysical Journal Letters, 842(2), L24. https://doi.org/10.3847/2041-8213/aa784c

Most massive stars end their lives in core-collapse supernova explosions and enrich the interstellar medium with explosively nucleosynthesized elements. Following core collapse, the explosion is subject to instabilities as the shock propagates outwar... Read More about Very Deep inside the SN 1987A Core Ejecta: Molecular Structures Seen in 3D.

The VMC Survey - XXIV. Signatures of tidally stripped stellar populations from the inner Small Magellanic Cloud (2017)
Journal Article
Van Loon. (2017). The VMC Survey - XXIV. Signatures of tidally stripped stellar populations from the inner Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 2980 - 2995. https://doi.org/10.1093/mnras/stx205

We study the luminosity function of intermediate-age red clump stars using deep, near-infrared photometric data covering ~20 deg2 located throughout the central part of the Small Magellanic Cloud (SMC), comprising the main body and the galaxy's easte... Read More about The VMC Survey - XXIV. Signatures of tidally stripped stellar populations from the inner Small Magellanic Cloud.

Monitoring survey of pulsating giant stars in the Local Group galaxies: survey description, science goals, target selection (2017)
Journal Article
Van Loon. (2017). Monitoring survey of pulsating giant stars in the Local Group galaxies: survey description, science goals, target selection. Journal of Physics: Conference Series, https://doi.org/10.1088/1742-6596/869/1/012068

The population of nearby dwarf galaxies in the Local Group constitutes a complete galactic environment, perfect suited for studying the connection between stellar populations and galaxy evolution. In this study, we are conducting an optical monitorin... Read More about Monitoring survey of pulsating giant stars in the Local Group galaxies: survey description, science goals, target selection.

Monitoring pulsating giant stars in M33: star formation history and chemical enrichment (2017)
Journal Article
Van Loon. (2017). Monitoring pulsating giant stars in M33: star formation history and chemical enrichment. Journal of Physics: Conference Series, https://doi.org/10.1088/1742-6596/869/1/012062

We have conducted a near-infrared monitoring campaign at the UK InfraRed Telescope (UKIRT), of the Local Group spiral galaxy M33 (Triangulum). A new method has been developed by us to use pulsating giant stars to reconstruct the star formation histor... Read More about Monitoring pulsating giant stars in M33: star formation history and chemical enrichment.

The SAGE-Spec Spitzer Legacy program: the life-cycle of dust and gas in the Large Magellanic Cloud. Point source classification - III (2017)
Journal Article
Jones, O., Woods, P., Kemper, F., Kraemer, K., Sloan, G., Srinivasan, S., …Volk, K. (2017). The SAGE-Spec Spitzer Legacy program: the life-cycle of dust and gas in the Large Magellanic Cloud. Point source classification - III. Monthly Notices of the Royal Astronomical Society, 470(3), 3250 -3282. https://doi.org/10.1093/mnras/stx1101

The Infrared Spectrograph (IRS) on the Spitzer Space Telescope observed nearly 800 point sources in the Large Magellanic Cloud (LMC), taking over 1000 spectra. 197 of these targets were observed as part of the SAGE-Spec Spitzer Legacy program; the re... Read More about The SAGE-Spec Spitzer Legacy program: the life-cycle of dust and gas in the Large Magellanic Cloud. Point source classification - III.

Properties of CO$_2$ clathrate hydrates formed in the presence of MgSO$_4$ solutions with implications for icy moons (2017)
Journal Article
Safi, E., Thompson, S., Evans, A., Day, S., Murray, C., Parker, J., …Van Loon, J. T. (2017). Properties of CO$_2$ clathrate hydrates formed in the presence of MgSO$_4$ solutions with implications for icy moons. Astronomy & Astrophysics, 600(A88), https://doi.org/10.1051/0004-6361/201629791

There is evidence to suggest that clathrate hydrates have a significant effect on the surface geology of icy bodies in the Solar System. However the aqueous environments believed to be present on these bodies are likely to be saline rather than pure... Read More about Properties of CO$_2$ clathrate hydrates formed in the presence of MgSO$_4$ solutions with implications for icy moons.

The VLT-FLAMES Tarantula Survey: XXV. Surface nitrogen abundances of O-type giants and supergiants⋆⋆⋆ (2017)
Journal Article
Grin, N. J., Ramírez-Agudelo, O. H., de Koter, A., Sana, H., Puls, J., Brott, I., …Walborn, N. R. (2017). The VLT-FLAMES Tarantula Survey: XXV. Surface nitrogen abundances of O-type giants and supergiants⋆⋆⋆. Astronomy & Astrophysics, 600, Article A82. https://doi.org/10.1051/0004-6361/201629225

Context. Theoretically, rotation-induced chemical mixing in massive stars has far reaching evolutionary consequences, affecting the sequence of morphological phases, lifetimes, nucleosynthesis, and supernova characteristics. Aims. Using a sample o... Read More about The VLT-FLAMES Tarantula Survey: XXV. Surface nitrogen abundances of O-type giants and supergiants⋆⋆⋆.

ALMA observations of Molecules in Supernova 1987A (2017)
Journal Article
Matsuura, M., Indebetouw, R., Woosley, S., Bujarrabal, V., Abellán, F. J., McCray, R., …Yates, J. (2017). ALMA observations of Molecules in Supernova 1987A. Proceedings of the International Astronomical Union, 12(S331), 294-299. https://doi.org/10.1017/s1743921317004719

Supernova (SN) 1987A has provided a unique opportunity to study how SN ejecta evolve in 30 years time scale. We report our ALMA spectral observations of SN 1987A, taken in 2014, 2015 and 2016, with detections of CO, 28SiO, HCO+ and SO, with weaker li... Read More about ALMA observations of Molecules in Supernova 1987A.

DUSTiNGS III: Distribution of Intermediate-Age and Old Stellar Populations in Disks and Outer Extremities of Dwarf Galaxies (2017)
Journal Article
Van Loon. (2017). DUSTiNGS III: Distribution of Intermediate-Age and Old Stellar Populations in Disks and Outer Extremities of Dwarf Galaxies. Astrophysical Journal, https://doi.org/10.3847/1538-4357/834/1/78

We have traced the spatial distributions of intermediate-age and old stars in nine dwarf galaxies in the distant parts of the Local Group, using multi-epoch 3.6 and 4.5 µm data from the DUST in Nearby Galaxies with Spitzer (DUSTiNGS) survey. Using co... Read More about DUSTiNGS III: Distribution of Intermediate-Age and Old Stellar Populations in Disks and Outer Extremities of Dwarf Galaxies.

The ALMA detection of CO rotational line emission in AGB stars in the Large Magellanic Cloud (2016)
Journal Article
Van Loon. (2016). The ALMA detection of CO rotational line emission in AGB stars in the Large Magellanic Cloud. Astronomy and Astrophysics, https://doi.org/10.1051/0004-6361/201629590

Context. Low- and intermediate-mass stars lose most of their stellar mass at the end of their lives on the asymptotic giant branch (AGB). Determining gas and dust mass-loss rates (MLRs) is important in quantifying the contribution of evolved stars to... Read More about The ALMA detection of CO rotational line emission in AGB stars in the Large Magellanic Cloud.

The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud (2016)
Journal Article
Van Loon. (2016). The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 2995 - 3005. https://doi.org/10.1093/mnras/stw1853

Using the PACS and SPIRE spectrometers on-board the Herschel Space Observatory, we obtained spectra of two red supergiants (RSGs) in the Large Magellanic Cloud (LMC). Multiple rotational CO emission lines (J = 6–5 to 15-14) and 15 H2O lines were dete... Read More about The mass-loss rates of red supergiants at low metallicity: detection of rotational CO emission from two red supergiants in the Large Magellanic Cloud.

The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity (2016)
Journal Article
Goldman, S. R., van Loon, J. T., Zijlstra, A. A., Green, J. A., Wood, P. R., Nanni, A., …Gómez, J. F. (2017). The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity. Monthly Notices of the Royal Astronomical Society, 465(1), 403-433. https://doi.org/10.1093/mnras/stw2708

We present the results of our survey of 1612-MHz circumstellar OH maser emission from asymptotic giant branch (AGB) stars and red supergiants (RSGs) in the Large Magellanic Cloud (LMC). We have discovered four new circumstellar maser sources in the L... Read More about The wind speeds, dust content, and mass-loss rates of evolved AGB and RSG stars at varying metallicity.

K-band integral field spectroscopy and optical spectroscopy of massive young stellar objects in the Small Magellanic Cloud (2016)
Journal Article
Ward, J., Oliveira, J., Van Loon, J. T., & Sewiło, M. (2017). K-band integral field spectroscopy and optical spectroscopy of massive young stellar objects in the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 464(2), 1512 -1552. https://doi.org/10.1093/mnras/stw2386

We present K-band integral field spectroscopic observations towards 17 massive young stellar objects (YSOs) in the low-metallicity Small Magellanic Cloud (SMC) and two YSO candidates in the compact H?II regions N81 and N88 A (also in the SMC). These... Read More about K-band integral field spectroscopy and optical spectroscopy of massive young stellar objects in the Small Magellanic Cloud.

The infrared spectral properties of magellanic carbon stars (2016)
Journal Article
Van Loon. (2016). The infrared spectral properties of magellanic carbon stars. Astrophysical Journal, https://doi.org/10.3847/0004-637X/826/1/44

The Infrared Spectrograph on the Spitzer Space Telescope observed 184 carbon stars in the Magellanic Clouds. This sample reveals that the dust-production rate (DPR) from carbon stars generally increases with the pulsation period of the star. The comp... Read More about The infrared spectral properties of magellanic carbon stars.

CK Vul: a smorgasbord of hydrocarbons rules out a 1670 nova (and much else besides) (2016)
Journal Article
Van Loon. (2016). CK Vul: a smorgasbord of hydrocarbons rules out a 1670 nova (and much else besides). Monthly Notices of the Royal Astronomical Society, 2871 - 2876. https://doi.org/10.1093/mnras/stw352

We present observations of CK Vul obtained with the Spitzer Space Telescope. The infrared spectrum reveals a warm dust continuum with nebular, molecular hydrogen and HCN lines superimposed, together with the ‘Unidentified Infrared’ features. The nebu... Read More about CK Vul: a smorgasbord of hydrocarbons rules out a 1670 nova (and much else besides).

New quasars behind the Magellanic Clouds. Spectroscopic confirmation of near-infrared selected candidates (2016)
Journal Article
Van Loon. (2016). New quasars behind the Magellanic Clouds. Spectroscopic confirmation of near-infrared selected candidates. Astronomy & Astrophysics, https://doi.org/10.1051/0004-6361/201527398

Context. Quasi-stellar objects (quasars) located behind nearby galaxies provide an excellent absolute reference system for astrometric studies, but they are difficult to identify because of fore- and background contamination. Deep wide-field, high an... Read More about New quasars behind the Magellanic Clouds. Spectroscopic confirmation of near-infrared selected candidates.

XVII. Proper motions of the Small Magellanic Cloud and the Milky Way globular cluster 47 Tucanae (2016)
Journal Article
Cioni, M. L., Bekki, K., Girardi, L., de Grijs, R., Irwin, M. J., Ivanov, V. D., …Van Loon, J. T. (2016). XVII. Proper motions of the Small Magellanic Cloud and the Milky Way globular cluster 47 Tucanae. Astronomy & Astrophysics, 586, Article A77. https://doi.org/10.1051/0004-6361/201527004

Aims. In this study we use multi-epoch near-infrared observations from the VISTA survey of the Magellanic Cloud system (VMC) to measure the proper motions of different stellar populations in a tile of 1.5 deg2 in size in the direction of the Galactic... Read More about XVII. Proper motions of the Small Magellanic Cloud and the Milky Way globular cluster 47 Tucanae.

Detecting Long Period Variables in M 33 Using UKIRT-WFCAM Images (2015)
Conference Proceeding
Saberi, M., Javadi, A., van Loon, J. T., & Khosroshahi, H. (2015). Detecting Long Period Variables in M 33 Using UKIRT-WFCAM Images. In Vol. 497 – Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time (497)

We have used the UK InfraRed Telescope (UKIRT) to conduct a near-IR monitoring campaign to search for variable stars in the Local Group spiral galaxy M 33. Most of the 4643 detected variables appear to be Asymptotic Giant Branch (AGB) stars.

DUST in Nearby Galaxies with Spitzer (DUSTINGS): An Infrared Census of Extreme AGB Stars in Nearby Dwarf Galaxies (2015)
Conference Proceeding
Boyer, M. L., McQuinn, K. . B. . W., Barmby, P., Bonanos, A. . Z., Gehrz, R. . D., Gordon, K. . D., …Zijlstra, A. . A. (2015). DUST in Nearby Galaxies with Spitzer (DUSTINGS): An Infrared Census of Extreme AGB Stars in Nearby Dwarf Galaxies. In 497, Why Galaxies Care about AGB Stars III: A Closer Look in Space and Time

Nearby resolved dwarf galaxies provide excellent opportunities for studying the dust-producing late stages of stellar evolution. DUSTiNGS (DUST in Nearby Galaxies with Spitzer) is a 3.6- and 4.5-μm imaging survey of 50 dwarf galaxies within 1.5 Mpc.... Read More about DUST in Nearby Galaxies with Spitzer (DUSTINGS): An Infrared Census of Extreme AGB Stars in Nearby Dwarf Galaxies.

Probing the Local Bubble with diffuse interstellar bands: I. Project overview and southern hemisphere survey⋆ (2015)
Journal Article
Bailey, M., van Loon, J. T., Farhang, A., Javadi, A., Khosroshahi, H. G., Sarre, P. J., & Smith, K. T. (2016). Probing the Local Bubble with diffuse interstellar bands: I. Project overview and southern hemisphere survey⋆. Astronomy & Astrophysics, 585, A12. https://doi.org/10.1051/0004-6361/201526656

Context. The Sun traverses a low-density, hot entity called the Local Bubble. Despite its relevance to life on Earth, the conditions in the Local Bubble and its exact configuration are not very well known. Besides that, there is some unknown interste... Read More about Probing the Local Bubble with diffuse interstellar bands: I. Project overview and southern hemisphere survey⋆.

Detection of Rotational CO Emission From the Red-supergiants in the Large Magellanic Cloud (2015)
Journal Article
Matsuura, M., Sargent, B., Swinyard, B., Yates, J., Royer, P., Barlow, M., …Woods, P. (2015). Detection of Rotational CO Emission From the Red-supergiants in the Large Magellanic Cloud. EAS Publications Series, 71-72, 53-56. https://doi.org/10.1051/eas/1571010

It is yet well understood how mass-loss rates from evolved stars depend on metallicities. With a half of the solar metallicity and the distance of only 50 kpc, the evolved stars of the Large Magellanic Cloud (LMC) are an ideal target for studying mas... Read More about Detection of Rotational CO Emission From the Red-supergiants in the Large Magellanic Cloud.

Integral field spectroscopy of massive young stellar objects in the N113 H II region in the Large Magellanic Cloud (2015)
Journal Article
Ward, J., Oliveira, J., Van Loon, J. T., & Sewiło, M. (2016). Integral field spectroscopy of massive young stellar objects in the N113 H II region in the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 455(3), 2345 - 2362. https://doi.org/10.1093/mnras/stv2424

The Spitzer Surveying the Agents of Galaxy Evolution (SAGE) survey has allowed the identification and analysis of significant samples of Young Stellar Object (YSO) candidates in the Large Magellanic Cloud (LMC). However, the angular resolution of Spi... Read More about Integral field spectroscopy of massive young stellar objects in the N113 H II region in the Large Magellanic Cloud.

2dF-AAOmega spectroscopy of massive stars in the Magellanic Clouds: The north-eastern region of the Large Magellanic Cloud⋆⋆⋆ (2015)
Journal Article
Evans, C. J., van Loon, J. T., Hainich, R., & Bailey, M. (2015). 2dF-AAOmega spectroscopy of massive stars in the Magellanic Clouds: The north-eastern region of the Large Magellanic Cloud⋆⋆⋆. Astronomy & Astrophysics, 584, Article A5. https://doi.org/10.1051/0004-6361/201525882

We present spectral classifications from optical spectroscopy of 263 massive stars in the north-eastern region of the Large Magellanic Cloud. The observed two-degree field includes the massive 30 Doradus star-forming region, the environs of SN1987A,... Read More about 2dF-AAOmega spectroscopy of massive stars in the Magellanic Clouds: The north-eastern region of the Large Magellanic Cloud⋆⋆⋆.

Mapping atomic and difuse interstellar band absorption across the Magellanic clouds and the Milky Way (2015)
Journal Article
Bailey, M., Van Loon, J. T., Sarre, P. J., & Beckman, J. E. (2015). Mapping atomic and difuse interstellar band absorption across the Magellanic clouds and the Milky Way. Monthly Notices of the Royal Astronomical Society, 454(4), 4013-4026. https://doi.org/10.1093/mnras/stv2178

Diffuse interstellar bands (DIBs) trace warm neutral and weakly ionized diffuse interstellar medium (ISM). Here we present a dedicated, high signal-to-noise spectroscopic survey of two of the strongest DIBs, at 5780 and 5797 Å, in optical spectra of... Read More about Mapping atomic and difuse interstellar band absorption across the Magellanic clouds and the Milky Way.

ALMA reveals sunburn: CO dissociation around AGB stars in the globular cluster 47 Tucanae (2015)
Journal Article
McDonald, I., Zijlstra, A. A., Lagadec, E., Sloan, G. C., Boyer, M. L., Matsuura, M., …Groenewegen, M. A. T. (2015). ALMA reveals sunburn: CO dissociation around AGB stars in the globular cluster 47 Tucanae. Monthly Notices of the Royal Astronomical Society, 453(4), 4325-4337. https://doi.org/10.1093/mnras/stv1968

Atacama Large Millimetre Array observations show a non-detection of carbon monoxide around the four most luminous asymptotic giant branch (AGB) stars in the globular cluster 47 Tucanae. Stellar evolution models and star counts show that the mass-loss... Read More about ALMA reveals sunburn: CO dissociation around AGB stars in the globular cluster 47 Tucanae.

An evolutionary missing link? A modest-mass early-type galaxy hosting an oversized nuclear black hole (2015)
Journal Article
van Loon, J. T., & Sansom, A. E. (2015). An evolutionary missing link? A modest-mass early-type galaxy hosting an oversized nuclear black hole. Monthly Notices of the Royal Astronomical Society, 453(3), 2342-2349. https://doi.org/10.1093/mnras/stv1787

SAGE1C J053634.78−722658.5 is a galaxy at redshift z = 0.14, discovered behind the Large Magellanic Cloud in the SpitzerSpace Telescope‘Surveying the Agents of Galaxy Evolution’ Spectroscopy survey. It has very strong silicate emission at 10 μm but n... Read More about An evolutionary missing link? A modest-mass early-type galaxy hosting an oversized nuclear black hole.

Characterising the Protostellar Population of the Magellanic Clouds with VLT/SINFONI (2015)
Journal Article
Ward, J., Oliveira, J., van Loon, J., & Sewilo, M. (2015). Characterising the Protostellar Population of the Magellanic Clouds with VLT/SINFONI. Proceedings of the International Astronomical Union, 11(S315), https://doi.org/10.1017/s1743921316008449

At distances of ~50 kpc and ~60 kpc for the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC) respectively the Magellanic Clouds present us with a unique opportunity to study star formation in environments outside our own galaxy. Through... Read More about Characterising the Protostellar Population of the Magellanic Clouds with VLT/SINFONI.

Young Stellar Objects in the Magellanic Clouds: Herschel Spectroscopy First Results (2015)
Conference Proceeding
Oliveira, J. M., van Loon, J. T., & Sewiło, M. (2015). Young Stellar Objects in the Magellanic Clouds: Herschel Spectroscopy First Results. . https://doi.org/10.1017/s1743921316008231

We present preliminary results from spectroscopy obtained with PACS and SPIRE onboard the Herschel Space Observatory of a sample of massive Young Stellar Objects in the Magellanic Clouds. We analyse key gas-phase cooling species (OI], [CII], H2O, CO,... Read More about Young Stellar Objects in the Magellanic Clouds: Herschel Spectroscopy First Results.

Spitzer infrared spectrograph point source classification in the Small Magellanic Cloud (2015)
Journal Article
Ruffle, P. M., Kemper, F., Jones, O., Sloan, G., Kraemer, K., Woods, P. M., …Zijlstra, A. (2015). Spitzer infrared spectrograph point source classification in the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 451(4), 3504 -3536. https://doi.org/10.1093/mnras/stv1106

The Magellanic Clouds are uniquely placed to study the stellar contribution to dust emission. Individual stars can be resolved in these systems even in the mid-infrared, and they are close enough to allow detection of infrared excess caused by dust.... Read More about Spitzer infrared spectrograph point source classification in the Small Magellanic Cloud.

The VMC survey - XIV. First results on the look-back time star formation rate tomography of the Small Magellanic Cloud (2015)
Journal Article
Van Loon. (2015). The VMC survey - XIV. First results on the look-back time star formation rate tomography of the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 639 -661. https://doi.org/10.1093/mnras/stv141

We analyse deep images from the VISTA survey of the Magellanic Clouds in the YJKs filters, covering 14 deg2 (10 tiles), split into 120 subregions, and comprising the main body and Wing of the Small Magellanic Cloud (SMC). We apply a colour–magnitude... Read More about The VMC survey - XIV. First results on the look-back time star formation rate tomography of the Small Magellanic Cloud.

The stellar populations in the low-luminosity, early-type galaxy NGC 59 (2015)
Journal Article
Van Loon. (2015). The stellar populations in the low-luminosity, early-type galaxy NGC 59. Monthly Notices of the Royal Astronomical Society, 1338 - 1348. https://doi.org/10.1093/mnras/stv690

Low-luminosity galaxies may be the building blocks of more luminous systems. Southern African Large Telescope observations of the low-luminosity, early-type galaxy NGC 59 are obtained and analysed. These data are used to measure the stellar populatio... Read More about The stellar populations in the low-luminosity, early-type galaxy NGC 59.

The UK Infrared Telescope M33 monitoring project - IV. Variable red giant stars across the galactic disc (2015)
Journal Article
Van Loon. (2015). The UK Infrared Telescope M33 monitoring project - IV. Variable red giant stars across the galactic disc. Monthly Notices of the Royal Astronomical Society, 3973 -3991. https://doi.org/10.1093/mnras/stu2637

We have conducted a near-infrared monitoring campaign at the UK InfraRed Telescope, of the Local Group spiral galaxy M33 (Triangulum). The main aim was to identify stars in the very final stage of their evolution, and for which the luminosity is more... Read More about The UK Infrared Telescope M33 monitoring project - IV. Variable red giant stars across the galactic disc.

Probing the local bubble with diffuse interstellar abnds. II. The Dib properties in the northern hemisphere (2015)
Journal Article
Van Loon. (2015). Probing the local bubble with diffuse interstellar abnds. II. The Dib properties in the northern hemisphere. Astrophysical Journal, https://doi.org/10.1088/0004-637X/800/1/64

We present a new high signal-to-noise ratio spectroscopic survey of the Northern hemisphere to probe the Local Bubble and its surroundings using the ?5780 Å and ?5797 Å diffuse interstellar bands (DIBs). We observed 432 sightlines to a distance of 20... Read More about Probing the local bubble with diffuse interstellar abnds. II. The Dib properties in the northern hemisphere.

Probing the local bubble with diffuse interstellar bands. III. The northern hemisphere data and catalog (2015)
Journal Article
Van Loon. (2015). Probing the local bubble with diffuse interstellar bands. III. The northern hemisphere data and catalog. Astrophysical Journal, 33. https://doi.org/10.1088/0067-0049/216/2/33

We present new high signal-to-noise ratio (S/N) observations of the diffuse interstellar bands (DIBs) in the Local Bubble and its surroundings. We observed 432 sightlines and obtain the equivalent widths of the ?5780 and ?5797 Å DIBs up to a distance... Read More about Probing the local bubble with diffuse interstellar bands. III. The northern hemisphere data and catalog.

A STUBBORNLY LARGE MASS OF COLD DUST IN THE EJECTA OF SUPERNOVA 1987A (2015)
Journal Article
Matsuura, M., Dwek, E., Barlow, M. J., Babler, B., Baes, M., Meixner, M., …Yates, J. A. A STUBBORNLY LARGE MASS OF COLD DUST IN THE EJECTA OF SUPERNOVA 1987A. Astrophysical Journal, 800(1), 50. https://doi.org/10.1088/0004-637x/800/1/50

We present new Herschel photometric and spectroscopic observations of Supernova 1987A, carried out in 2012. Our dedicated photometric measurements provide new 70 μm data and improved imaging quality at 100 and 160 μm compared to previous observations... Read More about A STUBBORNLY LARGE MASS OF COLD DUST IN THE EJECTA OF SUPERNOVA 1987A.

An infrared census of dust in nearby galaxies with Spitxer (Dustings). II. Discovery of metal-poor dusty AGB stars (2015)
Journal Article
Van Loon. (2015). An infrared census of dust in nearby galaxies with Spitxer (Dustings). II. Discovery of metal-poor dusty AGB stars. Astrophysical Journal, 51. https://doi.org/10.1088/0004-637X/800/1/51

The DUSTiNGS survey (DUST in Nearby Galaxies with Spitzer) is a 3.6 and 4.5 µm imaging survey of 50 nearby dwarf galaxies designed to identify dust-producing asymptotic giant branch (AGB) stars and massive stars. Using two epochs, spaced approximatel... Read More about An infrared census of dust in nearby galaxies with Spitxer (Dustings). II. Discovery of metal-poor dusty AGB stars.

ERRATUM: “THE HERSCHEL INVENTORY OF THE AGENTS OF GALAXY EVOLUTION (HERITAGE) IN THE MAGELLANIC CLOUDS, A HERSCHEL OPEN TIME KEY PROGRAM” (2013, AJ, 146, 62) (2015)
Journal Article
Meixner, M., Panuzzo, P., Roman-Duval, J., Engelbracht, C., Babler, B., Seale, J., …Whitney, B. (2015). ERRATUM: “THE HERSCHEL INVENTORY OF THE AGENTS OF GALAXY EVOLUTION (HERITAGE) IN THE MAGELLANIC CLOUDS, A HERSCHEL OPEN TIME KEY PROGRAM” (2013, AJ, 146, 62). Astronomical Journal, 149(2), Article 88. https://doi.org/10.1088/0004-6256/149/2/88

We provide a corrected Table 4 that lists the total galaxy fluxes for the HERTIAGE bands and corresponding Figure 19 which plots these fluxes in comparison to prior measurements These corrected fluxes differ by up to 41% to what we reported in the or... Read More about ERRATUM: “THE HERSCHEL INVENTORY OF THE AGENTS OF GALAXY EVOLUTION (HERITAGE) IN THE MAGELLANIC CLOUDS, A HERSCHEL OPEN TIME KEY PROGRAM” (2013, AJ, 146, 62).

The influence of supernova remnants on the interstellar medium in the large magellanic cloud seen at 20-600 mu m wavelengths (2015)
Journal Article
Van Loon. (2015). The influence of supernova remnants on the interstellar medium in the large magellanic cloud seen at 20-600 mu m wavelengths. Astrophysical Journal, https://doi.org/10.1088/0004-637X/799/1/50

We present the analysis of supernova remnants (SNRs) in the Large Magellanic Cloud (LMC) and their influence on the environment at far-infrared (FIR) and submillimeter wavelengths. We use new observations obtained with the Herschel Space Observatory... Read More about The influence of supernova remnants on the interstellar medium in the large magellanic cloud seen at 20-600 mu m wavelengths.

An infrared census of dust in nearby galaxies with Spitzer (Dustings). I. Overview (2014)
Journal Article
Van Loon. (2014). An infrared census of dust in nearby galaxies with Spitzer (Dustings). I. Overview. Astrophysical Journal, https://doi.org/10.1088/0067-0049/216/1/10

Nearby resolved dwarf galaxies provide excellent opportunities for studying the dust-producing late stages of stellar evolution over a wide range of metallicity (–2.7 lesssim [Fe/H] lesssim –1.0). Here, we describe DUSTiNGS (DUST in Nearby Galaxies w... Read More about An infrared census of dust in nearby galaxies with Spitzer (Dustings). I. Overview.

The star formation history of the Magellanic Clouds derived from long-period variable star counts (2014)
Journal Article
Van Loon. (2014). The star formation history of the Magellanic Clouds derived from long-period variable star counts. Monthly Notices of the Royal Astronomical Society, 2214 -2222. https://doi.org/10.1093/mnras/stu1807

We present the first reconstruction of the star formation history (SFH) of the Large and Small Magellanic Clouds (LMC and SMC) using Long Period Variable stars. These cool evolved stars reach their peak luminosity in the near-infrared; thus, their K-... Read More about The star formation history of the Magellanic Clouds derived from long-period variable star counts.

Spectral and morphological analysis of the remnant of supernova 1987A with Alma and Atca (2014)
Journal Article
Van Loon. (2014). Spectral and morphological analysis of the remnant of supernova 1987A with Alma and Atca. Astrophysical Journal, https://doi.org/10.1088/0004-637X/796/2/82

We present a comprehensive spectral and morphological analysis of the remnant of supernova (SN) 1987A with the Australia Telescope Compact Array (ATCA) and the Atacama Large Millimeter/submillimeter Array (ALMA). The non-thermal and thermal component... Read More about Spectral and morphological analysis of the remnant of supernova 1987A with Alma and Atca.

HERschelKEY PROGRAM HERITAGE: A FAR-INFRARED SOURCE CATALOG FOR THE MAGELLANIC CLOUDS (2014)
Journal Article
Seale, J. P., Meixner, M., Sewiło, M., Babler, B., Engelbracht, C. W., Gordon, K., …Woods, P. M. (in press). HERschelKEY PROGRAM HERITAGE: A FAR-INFRARED SOURCE CATALOG FOR THE MAGELLANIC CLOUDS. Astronomical Journal, 148(6), 124. https://doi.org/10.1088/0004-6256/148/6/124

Observations from the HERschel Inventory of the Agents of Galaxy Evolution (HERITAGE) have been used to identify dusty populations of sources in the Large and Small Magellanic Clouds (LMC and SMC). We conducted the study using the HERITAGE catalogs o... Read More about HERschelKEY PROGRAM HERITAGE: A FAR-INFRARED SOURCE CATALOG FOR THE MAGELLANIC CLOUDS.

Eclipsing binary stars in the Large Magellanic Cloud: results from the EROS-2, OGLE and VMC surveys★ (2014)
Journal Article
Muraveva, T., Clementini, G., Maceroni, C., Evans, C. J., Moretti, M. I., Cioni, M. L., …van Loon, J. T. (2014). Eclipsing binary stars in the Large Magellanic Cloud: results from the EROS-2, OGLE and VMC surveys★. Monthly Notices of the Royal Astronomical Society, 443(1), 432-445. https://doi.org/10.1093/mnras/stu1151

We present a catalogue of 1768 eclipsing binary stars (EBs) detected in the Large Magellanic Cloud (LMC) by the second generation of the EROS survey (hereinafter EROS-2); 493 of them are new discoveries located in outer regions (out of the central ba... Read More about Eclipsing binary stars in the Large Magellanic Cloud: results from the EROS-2, OGLE and VMC surveys★.

THE VMC SURVEY. XI. RADIAL STELLAR POPULATION GRADIENTS IN THE GALACTIC GLOBULAR CLUSTER 47 TUCANAE (2014)
Journal Article
Li, C., de Grijs, R., Deng, L., Rubele, S., Wang, C., Bekki, K., …van Loon, J. T. (in press). THE VMC SURVEY. XI. RADIAL STELLAR POPULATION GRADIENTS IN THE GALACTIC GLOBULAR CLUSTER 47 TUCANAE. Astrophysical Journal, 790(1), 35. https://doi.org/10.1088/0004-637x/790/1/35

We present a deep near-infrared color–magnitude diagram of the Galactic globular cluster 47 Tucanae, obtained with the Visible and Infrared Survey Telescope for Astronomy (VISTA) as part of the VISTA near-infrared Y, J, Ks survey of the Magellanic Sy... Read More about THE VMC SURVEY. XI. RADIAL STELLAR POPULATION GRADIENTS IN THE GALACTIC GLOBULAR CLUSTER 47 TUCANAE.

Spitzer View Of Massive Star Formation In The Tidally Stripped Magellanic Bridge (2014)
Journal Article
Rosie Chen, C., Indebetouw, R., Muller, E., Kawamura, A., Gordon, K. D., Sewiło, M., …Van Loon, J. (2014). Spitzer View Of Massive Star Formation In The Tidally Stripped Magellanic Bridge. Astrophysical Journal, 785(2), Article 162. https://doi.org/10.1088/0004-637X/785/2/162

The Magellanic Bridge is the nearest low-metallicity, tidally stripped environment, offering a unique high-resolution view of physical conditions in merging and forming galaxies. In this paper, we present an analysis of candidate massive young stella... Read More about Spitzer View Of Massive Star Formation In The Tidally Stripped Magellanic Bridge.

The VLT-FLAMES Tarantula Survey: XVI. The optical and NIR extinction laws in 30 Doradus and the photometric determination of the effective temperatures of OB stars⋆ (2014)
Journal Article
Maíz Apellániz, J., Evans, C. J., Barbá, R. H., Gräfener, G., Bestenlehner, J. M., Crowther, P. A., …Walborn, N. R. (2014). The VLT-FLAMES Tarantula Survey: XVI. The optical and NIR extinction laws in 30 Doradus and the photometric determination of the effective temperatures of OB stars⋆. Astronomy & Astrophysics, 564, A63. https://doi.org/10.1051/0004-6361/201423439

Context. The commonly used extinction laws of Cardelli et al. (1989, ApJ, 345, 245) have limitations that, among other issues, hamper the determination of the effective temperatures of O and early B stars from optical and near-infrared (NIR) photomet... Read More about The VLT-FLAMES Tarantula Survey: XVI. The optical and NIR extinction laws in 30 Doradus and the photometric determination of the effective temperatures of OB stars⋆.

The VMC survey IX. Pilot study of the proper motion of stellar populations in the LMC from 2MASS and VISTA data (2014)
Journal Article
Cioni, M., Girardi, L., Moretti, M., Piffl, T., Ripepi, V., Rubele, S., …Van Loon, J. (2014). The VMC survey IX. Pilot study of the proper motion of stellar populations in the LMC from 2MASS and VISTA data. Astronomy & Astrophysics, 562, Article A32. https://doi.org/10.1051/0004-6361/201322100

Context. Proper motion (PM) studies are fundamental ingredients in the understanding of the orbital history of galaxies. Current measurements do not yet provide a satisfactory answer to the possible scenarios for the formation and evolution of the Ma... Read More about The VMC survey IX. Pilot study of the proper motion of stellar populations in the LMC from 2MASS and VISTA data.

Molecular hydrogen emission in the interstellar medium of the Large Magellanic Cloud (2014)
Journal Article
Naslim, N., Kemper, F., Madden, S. C., Hony, S., Chu, Y., Galliano, F., …Reach, W. T. (2014). Molecular hydrogen emission in the interstellar medium of the Large Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 446(3), 2490 - 2504. https://doi.org/10.1093/mnras/stu2276

We present the detection and analysis of molecular hydrogen emission towards ten interstellar regions in the Large Magellanic Cloud. We examined low-resolution infrared spectral maps of 12 regions obtained with the Spitzer infrared spectrograph (IRS)... Read More about Molecular hydrogen emission in the interstellar medium of the Large Magellanic Cloud.

The VMC Survey – X. Cepheids, RR Lyrae stars and binaries as probes of the Magellanic System's structure★ (2013)
Journal Article
Moretti, M. I., Clementini, G., Muraveva, T., Ripepi, V., Marquette, J. B., Cioni, M. L., …van Loon, J. T. (2013). The VMC Survey – X. Cepheids, RR Lyrae stars and binaries as probes of the Magellanic System's structure★. Monthly Notices of the Royal Astronomical Society, 437(3), 2702-2719. https://doi.org/10.1093/mnras/stt2081

The VISTA near-infrared Y, J, Ks survey of the Magellanic System (VMC) survey is obtaining multi-epoch photometry in the Ks band of the Magellanic System down to a limiting magnitude of Ks ∼ 19.3 for individual epoch data. The observations are spaced... Read More about The VMC Survey – X. Cepheids, RR Lyrae stars and binaries as probes of the Magellanic System's structure★.

SURVEYING THE AGENTS OF GALAXY EVOLUTION IN THE TIDALLY STRIPPED, LOW METALLICITY SMALL MAGELLANIC CLOUD (SAGE-SMC). III. YOUNG STELLAR OBJECTS (2013)
Journal Article
Sewiło, M., Carlson, L. R., Seale, J. P., Indebetouw, R., Meixner, M., Whitney, B. A., …Shiao, B. (in press). SURVEYING THE AGENTS OF GALAXY EVOLUTION IN THE TIDALLY STRIPPED, LOW METALLICITY SMALL MAGELLANIC CLOUD (SAGE-SMC). III. YOUNG STELLAR OBJECTS. Astrophysical Journal, 778(1), 15. https://doi.org/10.1088/0004-637x/778/1/15

The Spitzer Space Telescope Legacy Program SAGE-SMC allows global studies of resolved stellar populations in the SMC in a different environment than our Galaxy. Using the SAGE-SMC IRAC (3.6–8.0 μm) and MIPS (24 and 70 μm) catalogs and images combined... Read More about SURVEYING THE AGENTS OF GALAXY EVOLUTION IN THE TIDALLY STRIPPED, LOW METALLICITY SMALL MAGELLANIC CLOUD (SAGE-SMC). III. YOUNG STELLAR OBJECTS.

The VLT-FLAMES Tarantula Survey: XI. A census of the hot luminous stars and their feedback in 30 Doradus (2013)
Journal Article
Doran, E. I., Crowther, P. A., de Koter, A., Evans, C. J., McEvoy, C., Walborn, N. R., …Vink, J. S. (2013). The VLT-FLAMES Tarantula Survey: XI. A census of the hot luminous stars and their feedback in 30 Doradus. Astronomy & Astrophysics, 558, Article A134. https://doi.org/10.1051/0004-6361/201321824

Context. The VLT-FLAMES Tarantula Survey has an extensive view of the copious number of massive stars in the 30 Doradus (30 Dor) star forming region of the Large Magellanic Cloud. These stars play a crucial role in our understanding of the stellar fe... Read More about The VLT-FLAMES Tarantula Survey: XI. A census of the hot luminous stars and their feedback in 30 Doradus.

The Herschel inventory of the agents of galaxy evolution in the Magellanic Clouds, a Herschel open time key program (2013)
Journal Article
Meixner, M., Panuzzo, P., Roman-Duval, J., Engelbracht, C., Babler, B., Seale, J., …Whitney, B. (2013). The Herschel inventory of the agents of galaxy evolution in the Magellanic Clouds, a Herschel open time key program. Astronomical Journal, 146(3), Article 62. https://doi.org/10.1088/0004-6256/146/3/62

We present an overview of the HERschel Inventory of The Agents of Galaxy Evolution (HERITAGE) in the Magellanic Clouds project, which is a Herschel Space Observatory open time key program. We mapped the Large Magellanic Cloud (LMC) and Small Magellan... Read More about The Herschel inventory of the agents of galaxy evolution in the Magellanic Clouds, a Herschel open time key program.

CARBON MONOXIDE IN THE COLD DEBRIS OF SUPERNOVA 1987A (2013)
Journal Article
Kamenetzky, J., McCray, R., Indebetouw, R., Barlow, M. J., Matsuura, M., Baes, M., …Zanardo, G. (in press). CARBON MONOXIDE IN THE COLD DEBRIS OF SUPERNOVA 1987A. Astrophysical Journal Letters, 773(2), L34. https://doi.org/10.1088/2041-8205/773/2/l34

We report spectroscopic and imaging observations of rotational transitions of cold CO and SiO in the ejecta of SN1987A, the first such emission detected in a supernova remnant. In addition to line luminosities for the CO J = 1–0, 2–1, 6–5, and 7–6 tr... Read More about CARBON MONOXIDE IN THE COLD DEBRIS OF SUPERNOVA 1987A.

DUSTY OB STARS IN THE SMALL MAGELLANIC CLOUD. I. OPTICAL SPECTROSCOPY REVEALS PREDOMINANTLY MAIN-SEQUENCE OB STARS (2013)
Journal Article
Sheets, H. A., Bolatto, A. D., van Loon, J. T., Sandstrom, K., Simon, J. D., Oliveira, J. M., & Barbá, R. H. (in press). DUSTY OB STARS IN THE SMALL MAGELLANIC CLOUD. I. OPTICAL SPECTROSCOPY REVEALS PREDOMINANTLY MAIN-SEQUENCE OB STARS. Astrophysical Journal, 771(2), Article 111. https://doi.org/10.1088/0004-637x/771/2/111

We present the results of optical spectroscopic follow-up of 125 candidate main sequence OB stars in the Small Magellanic Cloud (SMC) that were originally identified in the S3MC infrared imaging survey as showing an excess of emission at 24 μm indica... Read More about DUSTY OB STARS IN THE SMALL MAGELLANIC CLOUD. I. OPTICAL SPECTROSCOPY REVEALS PREDOMINANTLY MAIN-SEQUENCE OB STARS.

DUSTY OB STARS IN THE SMALL MAGELLANIC CLOUD. II. EXTRAGALACTIC DISKS OR EXAMPLES OF THE PLEIADES PHENOMENON? (2013)
Journal Article
Adams, J. J., Simon, J. D., Bolatto, A. D., Sloan, G. C., Sandstrom, K. M., Schmiedeke, A., …Keller, L. D. (2013). DUSTY OB STARS IN THE SMALL MAGELLANIC CLOUD. II. EXTRAGALACTIC DISKS OR EXAMPLES OF THE PLEIADES PHENOMENON?. Astrophysical Journal, 771(2), Article ARTN 112. https://doi.org/10.1088/0004-637x/771/2/112

We use mid-infrared Spitzer spectroscopy and far-infrared Herschel photometry for a sample of 20 main sequence O9–B2 stars in the Small Magellanic Cloud (SMC) with strong 24 μm excesses to investigate the origin of the mid-IR emission. Either debris... Read More about DUSTY OB STARS IN THE SMALL MAGELLANIC CLOUD. II. EXTRAGALACTIC DISKS OR EXAMPLES OF THE PLEIADES PHENOMENON?.

Putting the Diffuse Interstellar Bands on the Map – Literally! (2013)
Journal Article
van Loon, J. T. (2013). Putting the Diffuse Interstellar Bands on the Map – Literally!. Proceedings of the International Astronomical Union, 9(S297), 79-83. https://doi.org/10.1017/s1743921313015615

In a quest to further our understanding of the diffuse interstellar medium (ISM) as well as the unidentified carriers of the diffuse interstellar bands (DIBs), we are mapping DIBs across the sky using hundreds of hot stars as background torches – glo... Read More about Putting the Diffuse Interstellar Bands on the Map – Literally!.

The VMC survey: VII. Reddening map of the 30 Doradus field and the structure of the cold interstellar medium (2013)
Journal Article
Tatton, B. L., van Loon, J. T., Cioni, M., Clementini, G., Emerson, J. P., Girardi, L., …Rubele, S. (2013). The VMC survey: VII. Reddening map of the 30 Doradus field and the structure of the cold interstellar medium. Astronomy & Astrophysics, 554, A33. https://doi.org/10.1051/0004-6361/201321209

Context. The details of how galaxies have evolved over cosmological times are imprinted in their star formation history, chemical enrichment and morpho-kinematic structure. Parameters behind these, such as effective temperature and metallicity, can b... Read More about The VMC survey: VII. Reddening map of the 30 Doradus field and the structure of the cold interstellar medium.

The UK Infrared Telescope M33 monitoring project – III. Feedback from dusty stellar winds in the central square kiloparsec (2013)
Journal Article
Javadi, A., van Loon, J. T., Khosroshahi, H., & Mirtorabi, M. T. (2013). The UK Infrared Telescope M33 monitoring project – III. Feedback from dusty stellar winds in the central square kiloparsec. Monthly Notices of the Royal Astronomical Society, 432(4), 2824-2836. https://doi.org/10.1093/mnras/stt640

We have conducted a near-infrared monitoring campaign at the UK Infrared Telescope, of the Local Group spiral galaxy M33 (Triangulum). The main aim was to identify stars in the very final stage of their evolution, and for which the luminosity is more... Read More about The UK Infrared Telescope M33 monitoring project – III. Feedback from dusty stellar winds in the central square kiloparsec.

The thermal dust emission in N158–N159–N160 (LMC) star-forming complex mapped by Spitzer, Herschel and LABOCA (2013)
Journal Article
Galametz, M., Hony, S., Galliano, F., Madden, S. C., Albrecht, M., Bot, C., …van Loon, J. T. (2013). The thermal dust emission in N158–N159–N160 (LMC) star-forming complex mapped by Spitzer, Herschel and LABOCA. Monthly Notices of the Royal Astronomical Society, 431(2), 1596-1617. https://doi.org/10.1093/mnras/stt280

Low-metallicity galaxies exhibit different properties of the interstellar medium (ISM) compared to nearby spiral galaxies. Obtaining a resolved inventory of the various gas and dust components of massive star-forming regions and diffuse ISM is necess... Read More about The thermal dust emission in N158–N159–N160 (LMC) star-forming complex mapped by Spitzer, Herschel and LABOCA.

The VLT-FLAMES Tarantula Survey: IX. The interstellar medium seen through diffuse interstellar bands and neutral sodium⋆ (2013)
Journal Article
van Loon, J. T., Bailey, M., Tatton, B. L., Maíz Apellániz, J., Crowther, P. A., de Koter, A., …Walborn, N. R. (2013). The VLT-FLAMES Tarantula Survey: IX. The interstellar medium seen through diffuse interstellar bands and neutral sodium⋆. Astronomy & Astrophysics, 550, Article A108. https://doi.org/10.1051/0004-6361/201220210

Context. The Tarantula Nebula (a.k.a. 30 Dor) is a spectacular star-forming region in the Large Magellanic Cloud (LMC), seen through gas in the Galactic disc and halo. Diffuse interstellar bands (DIBs) offer a unique probe of the diffuse, cool-warm g... Read More about The VLT-FLAMES Tarantula Survey: IX. The interstellar medium seen through diffuse interstellar bands and neutral sodium⋆.

The VMC Survey: VI. Quasars behind the Magellanic system⋆ (2012)
Journal Article
Cioni, M. L., Kamath, D., Rubele, S., van Loon, J. T., Wood, P. R., Emerson, J. P., …Ripepi, V. (2013). The VMC Survey: VI. Quasars behind the Magellanic system⋆. Astronomy & Astrophysics, 549, Article A29. https://doi.org/10.1051/0004-6361/201219696

Context. The number and spatial distribution of confirmed quasi-stellar objects (QSOs) behind the Magellanic system is limited. This undermines their use as astrometric reference objects for different types of studies. Aims. We have searched for c... Read More about The VMC Survey: VI. Quasars behind the Magellanic system⋆.

Early-stage young stellar objects in the Small Magellanic Cloud (2012)
Journal Article
Oliveira, J., Th. van Loon, J., Sloan, G., Sewiło, M., Kraemer, K., Wood, P., …Simon, J. (2013). Early-stage young stellar objects in the Small Magellanic Cloud. Monthly Notices of the Royal Astronomical Society, 428(4), 3001-3033. https://doi.org/10.1093/mnras/sts250

We present new observations of 34 YSO candidates in the SMC. The anchor of the analysis is a set of Spitzer-IRS spectra, supplemented by groundbased 3-5 micron spectra, Spitzer and NIR photometry, optical spectroscopy and radio data. The sources' SED... Read More about Early-stage young stellar objects in the Small Magellanic Cloud.

Ice chemistry in massive Young Stellar Objects: the role of metallicity (2011)
Journal Article
Oliveira, J., van Loon, J., Sloan, G., Indebetouw, R., Kemper, F., Tielens, A. G. M., …Meixner, M. (2011). Ice chemistry in massive Young Stellar Objects: the role of metallicity. Monthly Notices of the Royal Astronomical Society: Letters, 411(1), L36–L40. https://doi.org/10.1111/j.1745-3933.2010.00990.x

We present the comparison of the three most important ice constituents (water, CO and CO2) in the envelopes of massive Young Stellar Objects (YSOs), in environments of different metallicities: the Galaxy, the Large Magellanic Cloud (LMC) and, for the... Read More about Ice chemistry in massive Young Stellar Objects: the role of metallicity.

Ice chemistry in embedded young stellar objects in the Large Magellanic Cloud (2009)
Journal Article
Oliveira, J. M., van Loon, J. T., Chen, C. R., Tielens, A. G. G. M., Sloan, G. C., Woods, P. M., …Marengo, M. (2009). Ice chemistry in embedded young stellar objects in the Large Magellanic Cloud. Astrophysical Journal, 707(1269), https://doi.org/10.1088/0004-637X/707/2/1269

We present spectroscopic observations of a sample of 15 embedded young stellar objects (YSOs) in the Large Magellanic Cloud (LMC). These observations were obtained with the Spitzer Infrared Spectrograph (IRS) as part of the SAGE-Spec Legacy program.... Read More about Ice chemistry in embedded young stellar objects in the Large Magellanic Cloud.

Star Formation in the Eagle Nebula and NGC 6611 (2006)
Journal Article
Oliveira, J. M., Jeffries, R. D., & van Loon, J. T. (2006). Star Formation in the Eagle Nebula and NGC 6611. Proceedings of the International Astronomical Union, 2(S237), https://doi.org/10.1017/S1743921307002487

We present IZJHKL' photometry of the core of the cluster NGC 6611 in the Eagle Nebula. This photometry is used to constrain the Initial Mass Function (IMF) and the circumstellar disk frequency of the young stellar objects. Optical spectroscopy of 258... Read More about Star Formation in the Eagle Nebula and NGC 6611.

Circumstellar discs in the young σ Orionis cluster (2006)
Journal Article
Oliveira, J., Jeffries, R., Van Loon, J., & Rushton, M. (2006). Circumstellar discs in the young σ Orionis cluster. Monthly Notices of the Royal Astronomical Society, 369(1), 272 -280. https://doi.org/10.1111/j.1365-2966.2006.10299.x

We present new K- and L'-band imaging observations for members of the young (3-5 Myr) sigma Orionis cluster, obtained with UIST at UKIRT. We determine (K-L') colour excesses with respect to the photospheres, finding evidence for warm circumstellar du... Read More about Circumstellar discs in the young σ Orionis cluster.

Circumstellar discs around solar-mass stars in NGC 6611 (2005)
Journal Article
Oliveira, J., Jeffries, R., Th. van Loon, J., Littlefair, S., & Naylor, T. (2005). Circumstellar discs around solar-mass stars in NGC 6611. Monthly Notices of the Royal Astronomical Society: Letters, 358(1), L21-L24. https://doi.org/10.1111/j.1745-3933.2005.00020.x

We have performed IZJHKL' observations in NGC 6611, the young cluster that ionises the Eagle Nebula. We have discovered a rich pre-main sequence concentrated around the O-stars in the cluster. As measured by their L'-band excesses, at least 58% +/- 5... Read More about Circumstellar discs around solar-mass stars in NGC 6611.

Young stars and their circumstellar disks in the Sigma Orionis cluster (2004)
Conference Proceeding
M. Oliveira, J., D. Jeffries, R., Th. van Loon, J., & J. Kenyon, M. (2004). Young stars and their circumstellar disks in the Sigma Orionis cluster. In Open Issues in Local Star Formation (55–62). https://doi.org/10.1007/1-4020-2600-5_6

The sigma Orionis cluster is a young association evolving under the disruptive influence of its massive O-star namesake. We are analysing this cluster as part of a program to characterise the influence of O-stars on the early stages of stellar evolut... Read More about Young stars and their circumstellar disks in the Sigma Orionis cluster.

Mid-infrared observations of young stellar objects in the vicinity of sigma Orionis (2004)
Journal Article
Oliveira, J. M., & van Loon, J. T. (2004). Mid-infrared observations of young stellar objects in the vicinity of sigma Orionis. Astronomy & Astrophysics, 418(2), https://doi.org/10.1051/0004-6361%3A20034518

We present new mid-infrared observations of objects in the vicinity of the O-star sigma Orionis, obtained with TIMMI-2 at ESO. By constraining their near- and mid-infrared spectral energy distributions, we established the nature of previously known I... Read More about Mid-infrared observations of young stellar objects in the vicinity of sigma Orionis.

An L'-band survey for circumstellar discs around low-mass stars in the young σ Orionis cluster (2004)
Journal Article
Jeffries, R., Oliveira, J., & Van Loon, J. (2004). An L'-band survey for circumstellar discs around low-mass stars in the young σ Orionis cluster. Monthly Notices of the Royal Astronomical Society, 347(4), 1327 -1336. https://doi.org/10.1111/j.1365-2966.2004.07315.x

We present new K- and L'-band imaging of a representative sample of members of the young 3-5 Myr old sigma Orionis cluster. We identified objects with (K-L') excess by analysing colour-colour diagrams and comparing the observations with empirical mai... Read More about An L'-band survey for circumstellar discs around low-mass stars in the young σ Orionis cluster.

The kinematics and physical properties for some H II regions to the North-East of NGC 4945**
Presentation / Conference
Van Loon. The kinematics and physical properties for some H II regions to the North-East of NGC 4945**. Presented at 3rd International Scientific Conference of Alkafeel University (ISCKU 2021)

We study the ionized outflows to the North-East of the edge-on spiral galaxy NGC 4945 with the combination of the Fabry-Perot (FP) and long-slit (LS) observations at the South African Large Telescope (SALT). The FP observation was used to analyse Ha... Read More about The kinematics and physical properties for some H II regions to the North-East of NGC 4945**.

The Role of AGB Stars Feedback in Sustaining Galaxy Evolution
Journal Article
Javadi, A., Van Loon, J., & Khosroshahi, H. The Role of AGB Stars Feedback in Sustaining Galaxy Evolution. arXiv, https://doi.org/10.48550/arXiv.1610.00254

We have conducted a near-infrared monitoring campaign at the UK InfraRed Telescope, of the Local Group spiral galaxy M33. The main aim was to identify stars in the very final stage of their evolution, and for which the luminosity is more directly rel... Read More about The Role of AGB Stars Feedback in Sustaining Galaxy Evolution.

The curious case of Betelgeuse
Conference Proceeding
van Loon, J. T. (2023). The curious case of Betelgeuse. In The Sixteenth Marcel Grossmann Meeting On Recent Developments in Theoretical and Experimental General Relativity, Astrophysics, and Relativistic Field Theories (In 4 Volumes). https://doi.org/10.1142/9789811269776_0289

Betelgeuse is the nearest red supergiant, one of the brightest stars in our sky, and statistically speaking it would be expected to be “typical”. Yet it exhibits many features that seem “curious”, to say the least. For instance it has a high proper m... Read More about The curious case of Betelgeuse.