Non-adiabatic quasi-toroidal modes in a slowly rotating star Application to ZZ Ceti

Details Non-adiabatic quasi-toroidal modes in a slowly rotating star Application to ZZ Ceti Non-adiabatic quasi-toroidal modes in a slowly rotating star Application to ZZ Ceti

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...122..199b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 122, no. 1-2, June 1983, p. 199-206.

Astronomy and Astrophysics

Astrophysics

12

Stellar Models, Stellar Oscillations, Variable Stars, White Dwarf Stars, Hydrogen, Linear Equations, Mathematical Models, Nonadiabatic Conditions, Stellar Envelopes, Stellar Rotation

Scientific paper

A linear adiabatic and non-adiabatic analysis of the quasi-toroidal modes of a uniformly slowly rotating star is presented and applied to chemically stratified DA white dwarfs. These modes are unstable for sufficiently high values of the rotation of the star and in some range of the effective temperature and of the amount of hydrogen in the outer envelope. The destabilizing mechanism and the instability strip are the same as for the gravity modes considered by Dolez and Vauclair (1981), but the growth rates are much smaller.

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