Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102..295s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 102, July 1991, p. 295-302. CNRS-supported research.
Astronomy and Astrophysics
Astronomy
49
Cataclysmic Variables, Magnetic Stars, Stellar Evolution, White Dwarf Stars, Novae, Stellar Envelopes, Stellar Luminosity, Stellar Mass, Stellar Orbits, Stellar Temperature
Scientific paper
This paper presents an update of determinations of the CV white dwarf effective-temperature, T(eff), together with an initial exploration of the possible implications and constraints on the CV lifetimes and evolution based on the ensemble of white dwarf T(eff) values as a function of orbital period. The CV dwarf luminosities are derived by using the T(eff) data and adopting the masses of individual CV white dwarfs determined by Webbink (1990). The present ensemble of empirically determined white dwarf effective temperatures reveals a distribution centered near 16,000 K, implying a mean lower limit total cooling lifetime of 5 x 10 to the 8th yr for the majority of CV degenerates. The two coolest CV degenerates, VV Puppis and St LMi, were found among the strongly magnetic AM Her CVs.
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