All Outputs (201)

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.

Equality, diversity and inclusion perspectives (2019)
Journal Article
Van Loon. (2019). Equality, diversity and inclusion perspectives. Astronomy and Geophysics, 5.40 - 5.42. https://doi.org/10.1093/astrogeo/atz182

An overview of the developments arising from equality, diversity and inclusion events at this year’s National Astronomy Meeting, by Vinesh Maguire-Rajpaul on behalf of the organizers.

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.