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Tidal friction in early-type stars

1989; IOP Publishing; Volume: 342; Linguagem: Inglês

10.1086/167665

1538-4357

Peter Goldreich, P. D. Nicholson,

Astrophysics and Star Formation Studies

view Abstract Citations (190) References (9) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Tidal Friction in Early-Type Stars Goldreich, Peter ; Nicholson, Philip D. Abstract Theoretical and observational results related to tides in early-type stars are summarized. The results suggest that the tidal torque on an early-type star is concentrated near the boundary between the convective core and the radiative envelope, and that a train of gravity waves which is excited at this boundary outwardly transports the angular momentum removed from the fluid by the torque. Tidal despinning to synchronous rotation is shown to proceed from the outside to the inside of the star. The present model can account for the previous finding that Zahn's (1975, 1977) theory for tidal evolution in early-type close binaries is compatible with the observed rates of orbit circularization, while significantly underestimating the observed rates of spin synchronization. Publication: The Astrophysical Journal Pub Date: July 1989 DOI: 10.1086/167665 Bibcode: 1989ApJ...342.1079G Keywords: Binary Stars; Computational Astrophysics; Early Stars; Stellar Motions; Tides; Angular Momentum; Gravitational Waves; Perturbation Theory; Stellar Envelopes; Stellar Rotation; Torque; Astrophysics; STARS: BINARIES; STARS: EARLY-TYPE; STARS: ROTATION; WAVE MOTIONS full text sources ADS |