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Physical Properties of 5,000 Cool LMC Supergiants with Gaia XP Spectra: A Detailed Portrait of the Upper HR Diagram Hints at Missing Supernova Progenitors
Trevor Z. Dorn-Wallenstein, Kathryn F. Neugent, Emily M. Levesque
Characterizing the physical properties of cool supergiants allows us to probe the final stages of a massive star's evolution before it undergoes core collapse. Despite their import…
The Properties of Fast Yellow Pulsating Supergiants: FYPS Point the Way to Missing Red Supergiants
Trevor Z. Dorn-Wallenstein, Emily M. Levesque, James R. A. Davenport +3
Fast yellow pulsating supergiants (FYPS) are a recently-discovered class of evolved massive pulsator. As candidate post-red supergiant objects, and one of the few classes of pulsat…
Locating Red Supergiants in the Galaxy NGC 6822
Tzvetelina A. Dimitrova, Kathryn F. Neugent, Philip Massey +1
Using archival near-IR photometry, we identify 51 of the K-band brightest red supergiants (RSGs) in NGC 6822 and compare their physical properties with stellar evolutionary model p…
Testing Evolutionary Models with Red Supergiant and Wolf-Rayet Populations
Philip Massey, Kathryn F. Neugent, Trevor Z. Dorn-Wallenstein +3
Despite the many successes that modern massive star evolutionary theory has enjoyed, reproducing the apparent trend in the relative number of red supergiants (RSGs) and Wolf-Rayet…
Photometric Classifications of Evolved Massive Stars: Preparing for the Era of Webb and Roman with Machine Learning
Trevor Z. Dorn-Wallenstein, James R. A. Davenport, Daniela Huppenkothen +1
In the coming years, next-generation space-based infrared observatories will significantly increase our samples of rare massive stars, representing a tremendous opportunity to leve…
The Red Supergiant Content of M31 and M33
Philip Massey, Kathryn F. Neugent, Emily M. Levesque +2
We identify red supergiants (RSGs) in our spiral neighbors M31 and M33 using near-IR (NIR) photometry complete to a luminosity limit of log L/Lo=4.0. Our archival survey data cover…