Volume 578, June 2015
|Number of page(s)||24|
|Section||Stellar structure and evolution|
|Published online||11 June 2015|
IAASARS, National Observatory of Athens,
2 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
3 Núcleo de Astronomía de la Facultad de Ingeniería, Universidad Diego Portales, Av. Ejército 441, Santiago, Chile
4 Millennium Institute of Astrophysics, Santiago, Chile
5 The Henry A. Rowland Department of Physics and Astronomy, Johns Hopkins University, 3400 N. Charles Street, Baltimore, MD 21218, USA
Received: 20 January 2015
Accepted: 12 March 2015
Aims. We present an analysis of archival Spitzer images and new ground-based and Hubble Space Telescope (HST) near-infrared (IR) and optical images of the field of M 83 with the goal of identifying rare, dusty, evolved massive stars.
Methods. We present point source catalogs consisting of 3778 objects from Spitzer Infrared Array Camera (IRAC) Band 1 (3.6 μm) and Band 2 (4.5 μm), and 975 objects identified in Magellan 6.5 m FourStar near-IR J and Ks images. A combined catalog of coordinate matched near- and mid-IR point sources yields 221 objects in the field of M 83.
Results. We find 49 strong candidates for massive stars which are very promising objects for spectroscopic follow-up. Based on their location in a B − V versus V − I diagram, we expect at least 24, or roughly 50%, to be confirmed as red supergiants.
Key words: catalogs / galaxies: individual: M 83 / galaxies: stellar content / stars: massive / stars: evolution
This paper includes data gathered with the 6.5 m Magellan Telescopes located at Las Campanas Observatory, Chile.
Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555.
Figures 12−23 are available in electronic form at http://www.aanda.org
Full Tables 1 and 3 are only available at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (184.108.40.206) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/578/A100
© ESO, 2015
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