Short-term Variability of Evolved Massive Stars with TESS. II. A New Class of Cool, Pulsating Supergiants

@article{DornWallenstein2020ShorttermVO,
  title={Short-term Variability of Evolved Massive Stars with TESS. II. A New Class of Cool, Pulsating Supergiants},
  author={T. Dorn-Wallenstein and E. Levesque and K. Neugent and J. Davenport and B. Morris and Keyan Gootkin},
  journal={The Astrophysical Journal},
  year={2020},
  volume={902},
  pages={24}
}
Massive stars briefly pass through the yellow supergiant (YSG) phase as they evolve redward across the HR diagram and expand into red supergiants (RSGs). Higher-mass stars pass through the YSG phase again as they evolve blueward after experiencing significant RSG mass loss. These post-RSG objects offer us a tantalizing glimpse into which stars end their lives as RSGs, and why. One telltale sign of a post-RSG object may be an instability to pulsations, depending on the star's interior structure… Expand
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