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Outstanding Issues for Post-Main Sequence Evolution:

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Abstract

We review the question of the empirical and theoretical instabilityregions in the HR diagram for evolved, compact stars. These include thethree families of pulsating white dwarfs (g-mode pulsators excitedthrough mechanisms associated with partial ionization and convection inthe stellar envelope), the pulsating subdwarf B stars (p-mode variablesexcited through a classic kappa mechanism associated with the radiativelevitation of iron in the stellar envelope), and the `Betsy stars',the brand new class of long-period, g-mode pulsators of the subdwarf Btype discovered recently.

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Authors and Affiliations

  1. Département de Physique, Université de Montréal, C.P. 6128, Succ. Centre-Ville, Montréal, Québec H3C 3J7, Canada

    Gilles Fontaine & Pierre Brassard

  2. Observatoire Midi-Pyrénées, 14 Avenue Edouard Belin, 31400, Toulouse, France

    Stéphane Charpinet

Authors
  1. Gilles Fontaine
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  2. Pierre Brassard
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  3. Stéphane Charpinet
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Fontaine, G., Brassard, P. & Charpinet, S. Outstanding Issues for Post-Main Sequence Evolution:. Astrophysics and Space Science 284, 257–268 (2003). https://doi.org/10.1023/A:1023256122434

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