Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apj...321..394s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 321, Oct. 1, 1987, p. 394-403.
Astronomy and Astrophysics
Astrophysics
36
Angular Momentum, Hydrogen, Nuclear Fusion, Stellar Mass Accretion, White Dwarf Stars, Carbon, Novae, Oxygen, Stellar Models
Scientific paper
The authors present the results of numerical calculations of the accretion of H-rich material onto 1 M_sun; C/O white dwarfs and the resulting nuclear runaway. The accreting material arrives on the white dwarfs with angular momentum in the range of 10% - 100% of the Keplerian value and at rates of 10-11- 10-8M_sun;yr-1. The matter is assumed to arrive from an accretion disk and to mix by shear turbulence into the white dwarfs' surface layers. Maximum nuclear burning rates in the range 0.38 - 6.9×1015ergs g-1s-1 are reached, but no nova-like mass ejection results. So far, all models of nova outbursts lying between the two limiting cases of radial accretion and accretion with Keplerian angular momentum have failed to obtain a sufficiently strong nuclear runaway for nova-like mass ejection. Possible explanations of this failure are considered.
Kutter Siegfried G.
Sparks Warren M.
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