期刊
ASTRONOMY & ASTROPHYSICS
卷 578, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201425362
关键词
supergiants; stars: massive; stars: late-type; stars: AGB and post-AGB; Magellanic Clouds; surveys
资金
- European Commission [2010B/01, 2011A/014, 2012A/015]
- Spanish Ministerio de Economia y Competitividad (Mineco) [AYA201239364-C02-02]
- European Science Foundation (ESF)
- PNPS
- INSU
- National Aeronautics and Space Administration
- National Science Foundation
- STFC [ST/J00541X/1, ST/M007626/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/M007626/1, ST/J00541X/1] Funding Source: researchfish
Aims. 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. Methods. 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 in the clouds. Results. Around two hundred new red supergiants 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 to this.
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