A new survey of cool supergiants in the Magellanic Clouds

Abstract

In this study, we conduct a pilot program aimed at the red supergiant population of the Magellanic Clouds. We intend to extend the current known sample to the unexplored low end of the brightness distribution of these stars, building a more representative dataset with which to extrapolate their behaviour to other Galactic and extra-galactic environments. We select candidates using only near infrared photometry, and with medium resolution multi-object spectroscopy, we perform spectral classification and derive their line-of-sight velocities, confirming the nature of the candidates and their membership to the clouds. Around two hundred new RSGs have been detected, hinting at a yet to be observed large population. Using near and mid infrared photometry we study the brightness distribution of these stars, the onset of mass-loss and the effect of dust in their atmospheres. Based on this sample, new a priori classification criteria are investigated, combining mid and near infrared photometry to improve the observational efficiency of similar programs as this.

39 pages, 10 figures. Accepted for publication in A&A

References in corpus (10)

• Intrinsically Red Sources observed by Spitzer in the Galactic Mid-Plane
• Spitzer SAGE Infrared Photometry of Massive Stars in the Large Magellanic Cloud
• The Effective Temperatures and Physical Properties of Magellanic Cloud Red Supergiants: The Effects of Metallicity
• A massive cluster of Red Supergiants at the base of the Scutum-Crux arm
• Spitzer SAGE-SMC Infrared Photometry of Massive Stars in the Small Magellanic Cloud
• The cool supergiant population of the massive young star cluster RSGC1
• A third red supergiant rich cluster in the Scutum-Crux Arm
• A Spitzer IRS Spectral Atlas of Luminous 8 micron Sources in the Large Magellanic Cloud
• The Period-Luminosity Relation of Red Supergiant Stars in the Small Magellanic Cloud
• Red supergiants around the obscured open cluster Stephenson 2

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• Red supergiant stars in binary systems II. Confirmation of B-type companions of red supergiants in the Small Magellanic Cloud using Hubble ultra-violet spectroscopy
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• The Properties of Fast Yellow Pulsating Supergiants: FYPS Point the Way to Missing Red Supergiants