Tidal effects in twin-degenerate binaries

Details Tidal effects in twin-degenerate binaries Tidal effects in twin-degenerate binaries

Mar 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.207..433c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 207, March 15, 1984, p. 433-443.

Astronomy and Astrophysics

Astronomy

15

Binary Stars, Gravitational Effects, Stellar Evolution, Stellar Oscillations, Velocity Distribution, White Dwarf Stars, Mass To Light Ratios, Orbital Elements, Stellar Models, Synchronism, Torque

Scientific paper

The tidal velocity field is calculated for an initially non-rotating low mass white dwarf secondary in a twin-degenerate binary. These motions are used to find the tidal torque on the secondary, to first order in the orbital frequency, and an expression is derived for the synchronization time. For a lobe-filling secondary the synchronization time has a weak dependence on the mass and luminosity of the star, and for the binary G61-29 is found to be of the same order as the estimated lifetime of the system. It is emphasized, however, that tidal excitation of non-radial oscillatory modes in the secondary may significantly shorten the synchronization time.

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