Measurement of spin in twenty binary systems

Details Measurement of spin in twenty binary systems Measurement of spin in twenty binary systems

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986cha%26a..10...54t&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 10, Issue 1, p. 54-61.

Astronomy and Astrophysics

Astrophysics

4

Scientific paper

The spin velocities of 20 primaries and 5 secondaries in 20 binary systems were measured with the Condé Reticon on the McDonald 2.1 m telescope. 14 of the primaries and all 5 of the secondaries measured show synchronous rotation. The star, 62 Per, previously thought to have V sin i = 0,, turned out to have V sin i = 200 km/s. Results for other stars are in basic agreement with previous measurements (0 Per has not been measured before). For TX UMa, the NaI D-line was found to be stronger in the secondary than in the primary, from which fact a mass-ratio of 0.32 was deduced.

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