Are Some Pre Cataclysmic Variables also POST Cataclysmic Variables

Details Are Some Pre Cataclysmic Variables also POST Cataclysmic Variables Are Some Pre Cataclysmic Variables also POST Cataclysmic Variables

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995mnras.276.1336s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 276, NO. 4/OCT15, P.1336, 1995

Astronomy and Astrophysics

Astronomy

6

Stars: Abundances - Binaries: Close - Stars: Evolution - Novae, Cataclysmic Variables - Infrared: Stars

Scientific paper

We propose an evolutionary scenario in which post-common-envelope binaries (PCEBs) with secondary component masses between 0.8 Msun and 1.2 M0 start semi-detached evolution almost immediately after the common-envelope (CE) phase. These systems detach due to unstable mass transfer when the secondary develops a thick convective envelope. The duration of the detached phase is a few times 108 yr, depending on the efficiency of magnetic braking and gravitational radiation. We suggest that some of the systems that have been classified as PCEBs may be in this stage of evolution and hence would be more realistically classified as pre-cataclysmic variables (PreCVs). We also propose an observational test based on measurements of the carbon and oxygen isotopic ratios from the infrared CO bands.

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