Machine Learning Classification of Young Stellar Objects and Evolved Stars in the Magellanic Clouds Using the Probabilistic Random Forest Classifier (2024)
Journal Article
Ghaziasgar, S., Abdollahi, M., Javadi, A., van Loon, J. T., McDonald, I., Oliveira, J., & Khosroshahi, H. G. (in press). Machine Learning Classification of Young Stellar Objects and Evolved Stars in the Magellanic Clouds Using the Probabilistic Random Forest Classifier. Communications of the Byurakan Astrophysical Observatory, 71(2), 377-382. https://doi.org/10.52526/25792776-24.71.2-377

The Magellanic Clouds (MCs) are excellent locations to study stellar dust emission and its contribution to galaxy evolution. Through spectral and photometric classification, MCs can serve as a unique environment for studying stellar evolution and gal... Read More about Machine Learning Classification of Young Stellar Objects and Evolved Stars in the Magellanic Clouds Using the Probabilistic Random Forest Classifier.

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.

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.

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 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 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.

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.

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.

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 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.

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.

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.

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 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.