All Outputs (83)

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.-R. L., Ivanov, V. D., Van Loon, J. T., Niederhofer, F., Oliveira, J. M., & 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.-R. L., Girardi, L., de Grijs, R., Ivanov, V. D., Marconi, M., Moretti, M.-., Oliveira, J. M., Petr-Gotzens, M. G., Ripepi, V., & 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.-R. L., Van Loon, J. T., de Grijs, R., Emerson, J., Ivanov, V. D., Marconi, M., Moretti, M. I., Ripepi, V., Niederhofer, F., & Sun, N.-C. (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.

Structural and Dynamical Analysis of 0.1 pc Cores and Filaments in the 30 Doradus-10 Giant Molecular Cloud (2020)
Journal Article
Indebetouw, R., Wong, T., Rosie Chen, C., Kepley, A., Lebouteiller, V., Madden, S., & Oliveira, J. (2020). Structural and Dynamical Analysis of 0.1 pc Cores and Filaments in the 30 Doradus-10 Giant Molecular Cloud. Astrophysical Journal, 888(2), Article 56. https://doi.org/10.3847/1538-4357/ab5db7

High-resolution (<0.1 pc) Atacama Large Millimeter/submillimeter Array (ALMA) observations of the 30Dor-10 molecular cloud 15 pc north of R136 are presented. The 12CO 2–1 emission morphology contains clumps near the locations of known mid-IR massive...

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., Wirström, E., Indebetouw, R., Ward, J. L., Van Loon, J. T., Wiseman, J., Zahorecz, S., Onishi, T., Kawamura, A., -H. Rosie Chen, C., Fukui, Y., & 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., Groenewegen, M. A. T., Choudhury, S., de Grijs, R., Van Loon, J. T., Oliveira, J. M., Ivanov, V. D., & 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.-Y., Lebouteiller, V., Chen, C.-H. R., Cormier, D., Filipovic, M., Carlson, L., Indebetouw, R., Madden, S., Meixner, M., Sargent, B., & 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.

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., Andernach, H., Leverenz, H., Norris, R. P., Alsaberi, R. Z. E., Anderson, C., Barnes, L. A., Bozzetto, L. M., Bufano, F., Bunton, J. D., Cavallaro, F., Collier, J. D., Dénes, H., Fukui, Y., Galvin, T., …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.-R. L., Bell, C. P. M., Rubele, S., Bekki, K., de Grijs, R., Girardi, L., Ivanov, V. D., Matijevic, G., Niederhofer, F., Oliveira, J. M., Ripepi, V., Subramanian, S., & 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.-R. L., Wright, A. H., Rubele, S., Nidever, D. L., Tatton, B. L., Van Loon, J. T., Ivanov, V. D., Subramanian, S., Oliveira, J. M., de Grijs, R., Pennock, C. M., Choi, Y., Zaritsky, D., Olsen, K., Niederhofer, F., Choudhury, S., Martínez-Delgado, D., & 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.

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., Zijlstra, A., Simon, J. D., Ferreira, R., Garay-MacLean, M., Hyatt, J. T., Geidel, K., Quinn, J., Santoro, D., & 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.

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., Oliveira, J. M., & 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 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.-R. L., Zaggia, S., Marigo, P., Bekki, K., Bressan, A., Clementini, G., de Grijs, R., Emerson, J., Groenewegen, M. A. T., Ivanov, V. D., Muraveva, T., Nanni, A., Oliveira, J. M., Ripepi, V., Sun, N.-C., & 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.-R., Rubele, S., Schmidt, T., Bekki, K., de Grijs, R., Emerson, J., Ivanov, V., Marconi, M., Oliveira, J., Petr-Gotzens, M., Ripepi, V., Van Loon, J. T., & 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., Ward, J. L., Rosie Chen, C.-H., Wiseman, J., Fukui, Y., Kawamura, A., Meixner, M., Onishi, 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.

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., Imai, H., Whitelock, P. A., Groenewegen, M. 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.

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.