Red Supergiant Candidates for Multimessenger Monitoring of the Next Galactic Supernova

Understand

We compile a catalog of 578 highly probable and 62 likely red supergiants (RSGs) of the Milky Way, which represents the largest list of Galactic RSG candidates designed for continuous follow-up to date.

• We match distances measured by Gaia DR3, 2MASS photometry, and a 3D Galactic dust map to obtain luminous bright late-type stars.
• Determining the stars' bolometric luminosities and effective temperatures, we compare to Geneva stellar evolution tracks to determine likely RSG candidates, and quantify contamination using a catalog of Galactic AGB in the same luminosity-temperature space.
• We add details for common or interesting characteristics of RSG, such as multi-star system membership, variability, and classification as a runaway.