The mode trapping properties of full DA white dwarf evolutionary models

Details The mode trapping properties of full DA white dwarf evolutionary models The mode trapping properties of full DA white dwarf evolutionary models

2002-03-25

arxiv.org/abs/astro-ph/0203453v1

Astronomy and Astrophysics

Astrophysics

10 pages, 14 figures. Accepted for publication in Astronomy & Astrophysics

Scientific paper

10.1051/0004-6361:20020384

An adiabatic, non-radial pulsation study of a 0.563 M_sun DA white dwarf model is presented on the basis of new evolutionary calculations performed in a self-consistent way with the predictions of time dependent element diffusion, nuclear burning and the history of the white dwarf progenitor. Emphasis is placed on the role played by the internal chemical stratification of these new models in the behaviour of the eigenmodes, and the expectations for the full g-spectrum of periods. The implications for the mode trapping properties are discussed at length. In this regard, we find that, for high periods, the viability of mode trapping as a mode selection mechanism is markedly weaker for our models, as compared with the situation in which the hydrogen-helium transition region is treated assuming equilibrium diffusion in the trace element approximation.

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