Astronomy and Astrophysics – Astronomy
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.8603p&link_type=abstract
American Astronomical Society, 194th AAS Meeting, #86.03; Bulletin of the American Astronomical Society, Vol. 31, p.976
Astronomy and Astrophysics
Astronomy
Scientific paper
The nature of the secondary stars in cataclysmic variables (CVs) has been discussed recently by several authors (e.g., Smith & Dhillon, 1998, MNRAS, 301, 767; Beuermann et al. 1998, A&A, 339, 518). In particular, Beuermann et al. compare theoretical predictions of the spectral types of secondary stars based on detailed evolutionary sequences with an observed sample of CVs containing well-determined spectral types. For orbital periods greater than 3 hours, they find that evolutionary sequences containing secondaries which have undergone significant nuclear processing of core material (> 50%) are in better agreement with spectral types in a sizable fraction of the observed sample than those sequences containing unevolved secondaries. In this paper, we perform population synthesis calculations using the standard model of the formation of CVs and examine what percentage of the secondaries in CVs could have undergone significant nuclear processing of core material prior to contact. This work is supported in part by NASA grant NAG 5-3892 to Arizona State University.
Howell Steve B.
Law Cliff S.
Politano Michael
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