On the structure of contact binaries. II - Zero-age models

Details On the structure of contact binaries. II - Zero-age models On the structure of contact binaries. II - Zero-age models

Sep 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...216..517l&link_type=abstract

Astrophysical Journal, Part 1, vol. 216, Sept. 1, 1977, p. 517-525.

Astronomy and Astrophysics

Astrophysics

30

Convective Flow, Eclipsing Binary Stars, Stellar Models, Stellar Structure, Chemical Composition, Main Sequence Stars, Stellar Atmospheres, Stellar Envelopes, Stellar Luminosity, Stellar Mass, Stellar Temperature

Scientific paper

Zero-age models of contact binaries of roughly solar composition are constructed on the basis of contact discontinuity hypothesis. With this formulation, systems with common radiative envelopes can be constructed as well as systems with common convective envelopes. Two models with total masses, respectively, of 1.5 and 3 solar masses are presented explicitly; both binary models have a mass ratio chosen equal to 0.5. The properties of the interior structure of these models are compared with the properties of zero-age single stars which have masses corresponding to the individual components. The predictions of the theory are compared with the empirical period-color relationship found by Eggen (1961, 1967) for W Ursae Majoris stars. The agreement with observations is satisfactory.

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