Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982mnras.200...49p&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 200, July 1982, p. 49-69.
Astronomy and Astrophysics
Astronomy
33
Binary Stars, Precession, Stellar Oscillations, Stellar Rotation, Stellar Structure, Tides, Apsides, Dispersion, Eccentric Orbits, Stellar Envelopes, Stellar Spectra
Scientific paper
A discussion is presented of the precession of a gaseous star in a close binary system, with attention to the case of a precessional amplitude which is both small and much less than such tidal distortion of the star as might justify a linear oscillation theory treatment of the problem. While the problem is compounded by the density of the stellar oscillation spectrum at the frequencies of interest, it is shown that precession can still occur for time scales of physical interest. Consideration of stellar mode damping permits the decay rate of precessional motion to be estimated, and an analogy with apsidal motion leads to a demonstration of damping for precession which is faster than, or on a time scale comparable to, that of the damping of eccentricity by tidal effects. As a consequence, no evidence of precession is expected in close binary systems where tidal circularization has already occurred.
Papaloizou John C. B.
Pringle James E.
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