On the observed properties and long-term structure and evolution of white dwarfs in cataclysmic variables

Details On the observed properties and long-term structure and evolution of white dwarfs in cataclysmic variables On the observed properties and long-term structure and evolution of white dwarfs in cataclysmic variables

Oct 1985

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985apj...297..538s&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 297, Oct. 15, 1985, p. 538-543.

Astronomy and Astrophysics

Astronomy

22

Cataclysmic Variables, Stellar Evolution, Stellar Structure, Ultraviolet Astronomy, White Dwarf Stars, Iue, Stellar Envelopes, Stellar Luminosity, Stellar Mass, Stellar Mass Accretion

Scientific paper

An attempt is made to explain the observed surface temperatures and luminosities of cataclysmic variable white dwarfs based on the cooling physics and time-averaged structure of the white dwarf in response to accretion. The evolutionary changes in core temperature and core luminosity as an accreting white dwarf evolves quasi-statically are compared with the cooling evolution of a nonaccreting, one solar mass, pure C-12 core. Then, the evolutionary behavior of the white dwarf envelope in mass and temperature, in response to long-term accretion, is used to predict temperatures and luminosities of white dwarfs during quiescent intervals between nova outbursts. It is shown that the observed luminosities and effective temperatures of the bare white dwarfs detected in some cataclysmic variables are the expected intrinsic values associated with classical nova thermonuclear outburst cycles. Two alternate interpretations of their observed surface temperatures and luminosities are assessed.

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