Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...213..114r&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 213, no. 1-2, April 1989, p. 114-126.
Astronomy and Astrophysics
Astrophysics
8
Binary Stars, Stellar Oscillations, Stellar Rotation, Tides, Gravitational Effects, Gravitational Fields, Stellar Mass, Stellar Models
Scientific paper
The influence of a slow uniform rotation on the tidal effects in close binary systems is studied. The low-frequency gravity modes driven by an outer gravitational field which have been studied previously in the adiabatic approximation are modified to take into account the radiative dissipation which takes place near the surface. The damping factor and the surface amplitude reduction factor are obtained by numerical integration of the basic equations in the envelope of the star for a 10-solar-mass stellar model which possesses a convective core and a radiative envelope. The effect of rotation on the dynamical surface tide and on the surface brightness distribution is examined, as well as the consequences for the resulting tidal torque. It is found that the rotation increases the surface distortion only for relatively large values of the tidal frequency. It can also increase the applied torque and enhance the synchronization process in a frequency range corresponding to large initial asynchronism.
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