Turning on and off mass transfer in cataclysmic binaries

Details Turning on and off mass transfer in cataclysmic binaries Turning on and off mass transfer in cataclysmic binaries

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...202...93r&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 202, no. 1-2, Aug. 1988, p. 93-100.

Statistics

Computation

111

Accretion Disks, Binary Stars, Cataclysmic Variables, Mass Transfer, Stellar Evolution, Angular Momentum, Computational Astrophysics, Main Sequence Stars, Photosphere, Stellar Atmospheres, White Dwarf Stars

Scientific paper

The author presents a simple model for the mass transfer in nearly semi-detached binaries that takes the finite scale height of the stellar atmosphere of the lobe-filling component properly into account. Application of this model to cataclysmic binaries (CBs) yields the following results: For mass transfer rates M⪉ 10-8M_sun;yr-1 the lobe-filling component is actually underfilling its critical potential by about one to a few scale heights HP. The time scale on which mass transfer turns on is of the order HP/R2 times the evolutionary time scale. If evolution is driven by magnetic braking the latter is of order 108yr and mass transfer turns on over a time scale ≡104yr.

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