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A catalog of known Galactic K-M stars of class I, candidate RSGs, in Gaia DR2

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arxiv 1905.03744 v2 pith:WH37BTND submitted 2019-05-09 astro-ph.GA astro-ph.SR

A catalog of known Galactic K-M stars of class I, candidate RSGs, in Gaia DR2

classification astro-ph.GA astro-ph.SR
keywords samplestarssupergiantscandidateclassconsistsgaiaallow
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We investigate individual distances and luminosities of a sample of 889 nearby candidate red supergiants with reliable parallaxes (plx/plxerr > 4 and RUWE < 2.7) from Gaia DR2. The sample was extracted from the historical compilation of spectroscopically derived spectral types by Skiff (2014), and consists of K-M stars that are listed with class I at least once. The sample includes well-known red supergiants from Humphreys (1978), Elias et al. (1985), Jura and Kleinmann (1990), and Levesque et al. (2005). Infrared and optical measurements from the 2MASS, CIO, MSX, WISE, MIPSGAL, GLIMPSE, and NOMAD catalogs allow us to estimate the stellar bolometric magnitudes. We analyze the stars in the luminosity versus effective temperature plane and confirm that 43 sources are highly-probably red supergiants with Mbol<-7.1 mag. 43% of the sample is made of stars with masses > 7 Msun. Another 30% of the sample consists of giant stars.

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