Eclipsing binaries with eccentric orbits

Details Eclipsing binaries with eccentric orbits Eclipsing binaries with eccentric orbits

Apr 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991baicz..42...98m&link_type=abstract

Astronomical Institutes of Czechoslovakia, Bulletin (ISSN 0004-6248), vol. 42, no. 2, April 1991, p. 98-108.

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Eccentric Orbits, Eclipsing Binary Stars, Stellar Orbits, Astrometry, Stellar Evolution

Scientific paper

Two groups of eclipsing binaries are dealt with: the first consists of all binaries with enough data in the General Catalog of Variable Stars (GCVS; Cholopov et al, 1987), the other of those for which accurate parameters are known. In the first group, problems with classification in GCVS are noticed and several examples of binaries with unexpected parameters are named. For binaries of the second group, their fractional radii, ages, and initial radii are used to discuss the relation of their evolutionary status and orbital eccentricity. Dependence of eccentricity on spectral type and age is observed, and no peak in the initial eccentricity distribution at e = 0 seems to be present. It is suggested that binary origin by fragmentation followed by disruption of initial multiple systems can explain all observed binaries, perhaps with the exception of contact systems in the main sequence. In several cases the circularization must be due to mass transfer in the eccentric orbit.

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