Synchronization in late-type binary stars

Details Synchronization in late-type binary stars Synchronization in late-type binary stars

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...141..227g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 141, no. 1, Dec. 1984, p. 227-231.

Astronomy and Astrophysics

Astrophysics

19

Binary Stars, Late Stars, Stellar Rotation, Angular Velocity, Dwarf Stars, Eccentric Orbits, Friction, Giant Stars, Main Sequence Stars, Synchronism, Tides

Scientific paper

The synchronism between rotation and revolution in late-type close binaries is rediscussed by an inspection of the published rotation velocities and rotation (photometric) periods of about 50 binary components. Basically, it is found that, as a rule, dwarfs having fractional radii of more than 0.05 appear to be in synchronous rotation and those with radii of less than 0.03 are in asynchronous rotation; asynchronism is more frequently observed in giants. Remarkably, the observed degree of synchronism appears to be in substantial agreement with current theoretical views (Zahn, 1977) on tidal friction in late-type binaries.

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