Tidal torques on accretion discs in close binary systems

Details Tidal torques on accretion discs in close binary systems Tidal torques on accretion discs in close binary systems

Nov 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977mnras.181..441p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 181, Nov. 1977, p. 441-454. Research supported by the IBM Corp.

Astronomy and Astrophysics

Astrophysics

193

Binary Stars, Celestial Mechanics, Momentum Transfer, Stellar Mass Accretion, Tides, Astrophysics, Roche Limit, Stellar Motions

Scientific paper

The transfer of angular momentum between an accretion disk and orbital motion in a close binary system is calculated. If the dissipative process in the accretion disk can transport angular momentum (e.g., shear viscosity), the disk fills its Roche lobe and tidal torques always dominate the transport process in the outer parts of the Roche lobe. If not, the disk does not expand, all the transferred material is accreted, and the inflow rate in the disk is controlled solely by tidal processes. It is shown that in an optically thick disk, the presence of a shear viscosity gives rise to a bulk viscosity of comparable magnitude.

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