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Title:
Steady state models of white dwarfs accreting helium or carbon/oxygen-rich matter
Authors:
Kawai, Yasushi; Saio, Hideyuki; Nomoto, Kenichi
Affiliation:
AA(Tokyo, University, Japan), AB(Tokyo, University, Japan), AC(Tokyo, University, Japan)
Publication:
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 328, May 1, 1988, p. 207-212. (ApJ Homepage)
Publication Date:
05/1988
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
Nuclear Reactions, Steady State, Stellar Interiors, Stellar Mass Accretion, Stellar Models, White Dwarf Stars, Binary Stars, Gas Mixtures, Giant Stars, Stellar Cores, Stellar Evolution
DOI:
10.1086/166282
Bibliographic Code:
1988ApJ...328..207K

Abstract

The authors have calculated steady state models of white dwarfs which accrete helium or carbon/oxygen (C+O)-rich matter. The helium accreting model consists of a highly degenerate C+O core and a helium burning shell, overlaid by a helium envelope. The C+O accreting model consists of a highly degenerate O+Ne+Mg core, a carbon burning shell, and a C+O envelope. For the C+O accreting white dwarfs, there exist minimum accretion rates below which no steady state solution exists. For accretion rates above the minimum value, there exist two branches of solutions: compact and normal branches. All the models in the compact branch are thermally unstable.

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