Space Science Reviews

, Volume 27, Issue 3–4, pp 483–489

Low-mass evolution from he ignition to beyond the horizontal branch

  • Keith Despain
RR lyrae and BL Herculis variables

Abstract

The evolution of an 0.6 m stellar model during core helium burning is presented. Following the off-center ignition of helium in the “core” flash, the star remains on the red giant branch for > 106 years, undergoing twelve additional flashes. After leaving the giant branch, the star evolves on the horizontal branch for 8.15×107 years before re turning to the giant branch and undergoing strong helium-shell flashes. The implications for horizontal branch and RR Lyrae stars are discussed.

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Copyright information

© D. Reidel Publishing Co 1980

Authors and Affiliations

  • Keith Despain
    • 1
    • 2
  1. 1.Department of AstronomyHaverford CollegeHaverford
  2. 2.Theoretical DivisionLos Alamos Scientific Laboratory, University of CaliforniaLos Alamos

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