Statistics – Computation
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985mnras.213..407p&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 213, March 15, 1985, p. 407-415.
Statistics
Computation
1
Cataclysmic Variables, Stellar Envelopes, Stellar Evolution, Stellar Mass Accretion, Stellar Models, White Dwarf Stars, Computational Astrophysics, Hydrodynamic Equations, Novae, Shock Waves, Stellar Luminosity, Thermonuclear Reactions
Scientific paper
The evolution of a sudden spherically symmetric accretion event on to a 1 solar mass carbon-oxygen white dwarf (WD) is calculated. Two models differing in the amount of accreted mass are studied using an implicity Lagrangian hydrodynamic code. The gas cloud surrounding the WD is several solar radii, initially at rest, in thermal equilibrium, and optically thick. In the case of the more massive cloud an accretion shock forms at the WD surface. The gas passes through the shock, bounces, and a thermal equilibrium configuration resembling a red giant is approached. For the less massive cloud, only about 70 percent of its mass passes through the shock. Half of it is accreted and the rest bounces off the WD surface. A second accretion episode follows, with some of the bouncing layers falling back onto the WD. The relevance of the latter model to recurrent and dwarf novae is discussed.
Livio Mario
Prialnik Dina
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