The period distribution of eclipsing binary systems

Details The period distribution of eclipsing binary systems The period distribution of eclipsing binary systems

Mar 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...119..218g&link_type=abstract

Astronomy and Astrophysics, vol. 119, no. 2, Mar. 1983, p. 218-226.

Astronomy and Astrophysics

Astrophysics

9

Eclipsing Binary Stars, Orbital Elements, Spectral Energy Distribution, Stellar Evolution, A Stars, B Stars, Histograms, Light Curve, O Stars, Statistical Analysis, Stellar Mass Accretion, Stellar Mass Ejection

Scientific paper

The period distributions of almost 1000 eclipsing binaries of various spectral types and lightcurve morphologies are examined, taking into account the most important observational selection effects. The relationship of the lightcurve morphology to the evolutionary stage is discussed, and histograms of the period distributions corrected for geometrical selection effects are presented. A significant deficit of short-period noncontact eclipsing binaries in the whole spectral range, together with an excess of late-type contact binaries, is found. The implications of the findings are discussed, including the existence of magnetic braking by stellar wind in the earliest evolutionary phase. The findings tend to support the results of models of close binary formation in the accretion regime which show that a coalescence of the two protostellar members occurs in the pre-main sequence evolutionary phases for separations smaller than about ten solar radii, so that only wider pairs can survive as double systems.

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