Computer Science – Numerical Analysis
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...321l..51s&link_type=abstract
Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 321, Oct. 1, 1987, p. L51-L53. DOE-supported resear
Computer Science
Numerical Analysis
25
Accretion Disks, Boundary Layer Plasmas, Novae, Stellar Evolution, Stellar Mass Accretion, Stellar Models, Nuclear Fusion, Numerical Analysis, Plasma Heating, White Dwarf Stars
Scientific paper
Accretion models describing the evolution of a close binary with a white-dwarf primary to produce a nova outburst are examined critically in the light of recent theoretical and observational investigations, with a focus on the thermal effects of accretion. Techniques for including boundary-layer heating in the computations are developed; numerical results for different amounts of heating are described; and it is concluded that accreted matter cannot land 'softly' on the surface, at least for realistic values of the accretion rate. The time scale for accretion, the mass accreted before runaway occurs, and the degree of degeneracy are shown to be greatly reduced when heating is included.
Shaviv Giora
Starrfield Sumner
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