Classical nova models with accretion heating at accretion rates of 10 exp -9 and 10 exp - 10 solar masses per year

Details Classical nova models with accretion heating at accretion rates of 10 exp -9 and 10 exp - 10 solar masses per year Classical nova models with accretion heating at accretion rates of 10 exp -9 and 10 exp - 10 solar masses per year

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apj...385..665p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 385, Feb. 1, 1992, p. 665-669.

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13

Accretion Disks, Cataclysmic Variables, Novae, Stellar Evolution, Stellar Mass Ejection, Stellar Models, Mass Transfer, Thermonuclear Reactions, White Dwarf Stars

Scientific paper

Two evolutionary sequences of accretion on to a 1.25 solar mass C-O white dwarf are computed for constant accretion rates of 10 exp -10 and 10 exp -9 solar mass/yr and are carried through the thermonuclear runaway and the dynamical phases of mass loss, followed by contraction of the remnant and decline. Improved algorithms are used for diffusion during the accretion phase and for the computation of mass loss. Accretional heating is taken into account. It is concluded that outbursts typical of classical novae may be achieved for the adopted rather high accretion rates that are compatible with observations. The heavy element mass fractions in the ejecta are found to be 0.31 and 0.19, the maximal velocities reached are 2300 and 1600 km/s, and mass loss lasts for 12 and 25 days, respectively, for the two models. The effect of diffusion and its dependence on the accretion rate are discussed.

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