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We present our new, fully-automated method to detect and measure the ages of star clusters in nearby galaxies, where individual stars can be resolved. The method relies purely on statistical analysis of observations and Monte-Carlo…

Studying the stellar populations in the outskirts of spiral galaxies can provide important constraints on their structure, formation, and evolution. To that end, we present VI photometry obtained with the Advanced Camera for Surveys for…

Astrophysics · Physics 2008-11-26 Michael K. Barker , Ata Sarajedini , Doug Geisler , Paul Harding , Robert Schommer

In the process of searching the Hubble Space Telescope archive, we have serendipitously discovered three populous Large Magellanic Cloud (LMC) clusters with ages that place them in the LMC `age gap.'. These clusters - NGC 2155, SL663, and…

Astrophysics · Physics 2007-05-23 Ata Sarajedini

Recent discovery of many dwarf satellite galaxies in the direction of the Small and Large Magellanic Clouds (SMC and LMC) provokes questions of their origins, and what they can reveal about galaxy evolution theory. Here, we predict the…

Astrophysics of Galaxies · Physics 2017-09-20 Gregory A. Dooley , Annika H. G. Peter , Jeffrey L. Carlin , Anna Frebel , Keith Bechtol , Beth Willman

The nearby Large Magellanic Cloud (LMC) provides a rare opportunity of a spatially resolved view of an external star-forming galaxy in gamma-rays. The LMC was detected at 0.1-100GeV as an extended source with CGRO/EGRET and using early…

High Energy Astrophysical Phenomena · Physics 2015-11-09 LAT Collaboration

The distribution of size as a function of age observed for star clusters in the Large Magellanic Cloud (LMC) is very puzzling: young clusters are all compact, while the oldest systems show both small and large sizes. It is commonly…

Astrophysics of Galaxies · Physics 2019-09-06 F. R. Ferraro , B. Lanzoni , E. Dalessandro , M. Cadelano , S. Raso , A. Mucciarelli , G. Beccari , C. Pallanca , -

We model the potentially observable populations of normal and millisecond radio pulsars in the Large and Small Magellanic Clouds (LMC and SMC) where the known population currently stands at 19 normal radio pulsars. Taking into account the…

Astrophysics of Galaxies · Physics 2015-05-19 J. P. Ridley , D. R. Lorimer

Recently obtained kinematic data has shown that the Large Magellanic Cloud (LMC) possesses an old stellar halo. In order to further characterize the properties of this halo, parametric King models are fit to the surface density of RR Lyrae…

Astrophysics · Physics 2009-11-10 David R. Alves

We present the analysis of a deep colour-magnitude diagram (CMD) of NGC 1831, a rich star cluster in the LMC. The data were obtained with HST/WFPC2 in the F555W (~V) and F814W (~I) filters, reaching m_555 ~ 25. We discuss and apply a method…

Astrophysics · Physics 2009-11-07 L. O. Kerber , B. X. Santiago , R. Castro , D. Valls-Gabaud

We obtained spectra of red giants in 15 Small Magellanic Cloud (SMC) clusters in the region of the CaII lines with FORS2 on the Very Large Telescope (VLT). We determined the mean metallicity and radial velocity with mean errors of 0.05 dex…

Solar and Stellar Astrophysics · Physics 2015-06-24 M. C. Parisi , D. Geisler , J. J. Clariá , S. Villanova , N. Marcionni , A. Sarajedini , A. J. Grocholski

The binary fraction of unevolved massive stars is thought to be 70-100% but there are few observational constraints on the binary fraction of the evolved version of a subset of these stars, the red supergiants (RSGs). Here we identify a…

Solar and Stellar Astrophysics · Physics 2020-08-03 Kathryn F. Neugent , Emily M. Levesque , Philip Massey , Nidia I. Morrell , Maria R. Drout

Previous studies of the Carina region have revealed its complexity and richness as well as a significant number of early-type stars. In many cases, these studies only concentrated on the central region or were not homogeneous. This latter…

Solar and Stellar Astrophysics · Physics 2016-08-24 J. A. Molina-Lera , G. Baume , R. Gamen , E. Costa , G. Carraro

We present a clean, magnitude-limited (IRAC1 or WISE1 $\leq$ 15.0 mag) multiwavelength source catalog for the SMC with 45,466 targets in total, with the purpose of building an anchor for future studies, especially for the massive star…

We report results of proper motions of 15 known Large Magellanic Cloud (LMC) old globular clusters (GCs) derived from the Gaia DR2 data sets. When these mean proper motions are gathered with existent radial velocity measurements to compose…

Astrophysics of Galaxies · Physics 2019-01-09 Andrés E. Piatti , Emilio J. Alfaro , Tristan Cantat-Gaudin

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 ($\sim1$-$10$ Gyr)…

This is the first of a series of papers devoted to a global study of the photometric properties of the red stellar sequences in a complete sample of the Large Magellanic Cloud clusters, by means of near infrared array photometry. Deep…

Astrophysics · Physics 2009-11-10 Francesco R. Ferraro , Livia Origlia , Vincenzo Testa , Claudia Maraston

We present flux-calibrated integrated spectra in the optical range (3700-6800 \AA) obtained at Complejo Astron\'omico El Leoncito (CASLEO, Argentina) for a sample of 10 concentrated star clusters belonging to the Large Magellanic Cloud…

Solar and Stellar Astrophysics · Physics 2016-06-29 Andrea V. Ahumada , Luis R. Vega , Juan J. Clariá , Mónica A. Oddone , Tali Palma

We present a new study of the spatial distribution and ages of the star clusters in the Small Magellanic Cloud (SMC). To detect and estimate the ages of the star clusters we rely on the new fully-automated method developed by Bitsakis et…

We present preliminary results from a new HST archival program aimed at tightly constraining the ancient (>4 Gyr ago) star formation histories (SFHs) of the field populations of the SMC and LMC. We demonstrate the quality of the archival…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Daniel R. Weisz , Andrew E. Dolphin , Evan D. Skillman , Jon Holtzman , Julianne J. Dalcanton , Andrew A. Cole , Kyle Neary

The stellar population and star clusters around six regions in the Large Magellanic Cloud (LMC) are studied to understand the correlation between star formation and cluster formation rates. We used the stellar database of the OGLE II LMC…

Astrophysics · Physics 2009-11-10 Annapurni Subramaniam
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