Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237...91h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 1, Oct. 1990, p. 91-96. Research supported by NSERC.
Astronomy and Astrophysics
Astrophysics
21
Eclipsing Binary Stars, Stellar Mass, Stellar Rotation, B Stars, Computer Techniques, Light Curve, Radial Velocity
Scientific paper
A careful determination of the projected rotational velocity of the contact B6-8II component of the eclipsing binary Beta Lyr and the assumption of synchronous rotation allow reliable masses for the two stars and many other physical elements of the binary to be estimated. The most accurate value of the mass function and a recent value of the projected rotational velocity yield component masses of 4.3 + or - 1.1 and 14.1 + or - 12.1 solar. However, ambiguities in both spectral type and rotational velocity for the contact star do not allow the oft-quoted masses of about 2 and 12 solar to be rejected.
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