Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...273..289m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 273, Oct. 1, 1983, p. 289-298. Research supported by the Science Research C
Astronomy and Astrophysics
Astrophysics
54
Novae, Stellar Mass Accretion, Stellar Rotation, White Dwarf Stars, Dynamic Stability, Perturbation, Stellar Interiors, Stellar Models
Scientific paper
The problem of how shear instabilities redistribute matter and angular momentum accreted by a star from a disk is considered. Necessary conditions for stability of the star to nonaxisymmmetric perturbations are derived by use of the short wavelength approximation. By considering growth rates, it is shown that freshly accreted material rapidly takes up a quasi-spherical distribution due to dynamical instabilities. However, mixing inward toward the stellar interior occurs on a thermal time scale or longer. The application of these results to accreting white dwarf models of classical novae are discussed.
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