Kavli Affiliate: Shunsaku Horiuchi
| First 5 Authors: Sarah Healy, Shunsaku Horiuchi, Marta Colomer Molla, Dan Milisavljevic, Jeff Tseng
| Summary:
We compile a catalog of 598 highly probable and 79 likely red supergiants
(RSGs) of the Milky Way, which represents the largest list of Galactic RSG
candidates to date. We matched 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 compared to Geneva stellar evolution tracks to determine
likely RSG candidates, and quantified 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. As potential future core-collapse
supernova (SN) progenitors, we studied the ability of the catalog to inform the
Supernova Early Warning System (SNEWS) coincidence network made to automate
pointing, and show that for 3D position estimates made possible by neutrinos,
the number of progenitor candidates can be significantly reduced, improving our
ability to observe the progenitor pre-explosion and the early phases of the
core-collapse supernova.
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