On the structure of contact binaries. IV - High-mass models

Details On the structure of contact binaries. IV - High-mass models On the structure of contact binaries. IV - High-mass models

Apr 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...229..657l&link_type=abstract

Astrophysical Journal, Part 1, vol. 229, Apr. 15, 1979, p. 657-660.

Other

10

Binary Stars, Main Sequence Stars, Stellar Evolution, Stellar Mass, Stellar Models, Stellar Structure, Convective Flow, Discontinuity, Hypotheses, Roche Limit, Stellar Envelopes, Stellar Luminosity

Scientific paper

Interior models for zero-age contact binaries of high total mass are constructed on the basis of the contact discontinuity hypothesis. The contact discontinuity in systems with a total mass greater than about 4 solar masses is shown to occur on the side of the primary rather than the secondary. Results for two models, one with masses of 4 + 2 solar masses and the other with 8 + 4 solar masses, are presented, along with the properties of the corresponding single stars. These results indicate that the most significant change introduced by the contact configuration is the appearance of a convection zone beneath the contact discontinuity at the Roche lobe of the primary. A proof is given that zero-age main-sequence radiative stars in thermal equilibrium cannot be expanded to fill their Roche lobes in a contact binary.

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