Circularization in B-Bype Eclipsing Binaries in both Magellanic Clouds

Details Circularization in B-Bype Eclipsing Binaries in both Magellanic Clouds Circularization in B-Bype Eclipsing Binaries in both Magellanic Clouds

Jan 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005hia....13..466n&link_type=abstract

Highlights of Astronomy, Vol. 13, as presented at the XXVth General Assembly of the IAU - 2003 [Sydney, Australia, 13 - 26 July

Astronomy and Astrophysics

Astronomy

Scientific paper

Making use of detached eclipsing binaries discovered by the OGLE and MACHO teams in the SMC and in the LMC respectively we give the value of the fractional radius above which cirularization occurs. This critical radius is around 0.25 to 0.26 regardless of the mass surface gravity or metallicity and is consistent with that found by Giuricin et al. (1984) for galactic binaries. These empirical facts are shown to be consistent with Zahn's (1975) theory of tidal dissipation. As a by-product of this study we provide approximate stellar parameters of the average component of 148 binaries in the SMC and of 354 binaries (some of which might be non-detached) in the LMC under the assumption of equal components.

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