Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a...102...17p&link_type=abstract
Astronomy and Astrophysics, vol. 102, no. 1, Sept. 1981, p. 17-19. Fonds de la Recherche Fondamentale Collective
Astronomy and Astrophysics
Astrophysics
76
Binary Stars, Momentum Transfer, Stellar Evolution, Stellar Mass Accretion, Angular Momentum, Angular Velocity, Critical Velocity, Stellar Rotation
Scientific paper
Double-contact binaries (Wilson, 1979; Wilson and Twigg, 1980) are interacting systems in which the accreting component rotates so fast that it fills its limiting rotational lobe, which is smaller than its Roche lobe. Both stars are in contact with their limiting lobes, but not with each other. Quantitative evidence is given that this type of system is a common phase in the evolution of most interacting binaries. A simplified model is used to show that during mass exchange in a closed binary system, enough angular momentum is transferred toward the mass accreting star to spin it up to its critical rotational velocity after gaining only a small percentage of its original mass. The consequences of this result for the evolution of closed binary systems are discussed briefly.
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