SIMBAD references

2001ApJ...560..934S - Astrophys. J., 560, 934-936 (2001/October-3)

Yellow hypergiants as dynamically unstable post-red supergiant stars.


Abstract (from CDS):

According to recent theoretical studies, the majority of single stars more massive than 30 M successfully evolve into red supergiants but then lose most of their hydrogen envelopes and metamorphose into hot blue remnants. While they are cool, they become dynamically unstable as a result of high radiation pressure and partial ionization of the gases in their outer layers. It is shown here that these unstable red supergiant models repeatedly shrink and reexpand on a thermal timescale when perturbed by heavy bursts of mass loss. Consequently, they fill up the domain of yellow hypergiants on the Hertzsprung-Russell diagram and display very fast rates of evolution there, as observed.

Abstract Copyright:

Journal keyword(s): Stars: Evolution - Stars: Mass Loss - Stars: Oscillations - Stars: Variables: Other

CDS comments: p. 935 : Variable A in M 33 = [HS53] A

Simbad objects: 9

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