Physics
Scientific paper
May 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980cpsp.book..453v&link_type=abstract
In NASA. Goddard Space Flight Center Current Probl. in Stellar Pulsation Instabilities p 453-500 (SEE N80-25229 15-90)
Physics
3
Stellar Radiation, Variable Stars, White Dwarf Stars, Periodic Variations, Pulse Amplitude, Stellar Luminosity, Stellar Mass Accretion, Stellar Rotation, Stellar Spectra, Stellar Temperature, Thermonuclear Reactions
Scientific paper
The current status of theoretical understanding of the oscillations observed in the ZZ Ceti stars and cataclysmic variables is briefly reviewed. Nonradial g-mode oscillations appear to provide a satisfactory explanation for the low amplitude variables such as R548, with periods in the range of approximately 200 to 300 seconds, but for the longer period (800 to 1000 seconds) oscillators, the situation is still unclear. Rotation may play an important role in this problem, and the effects of both slow and fast rotation upon the mode structure are discussed. In the cataclysmic variables, both accretion and thermonuclear burning may act to excite oscillations of the white dwarf.
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