The stability of low mass contact binaries

Details The stability of low mass contact binaries The stability of low mass contact binaries

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976mnras.176...81w&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 176, July 1976, p. 81-89.

Astronomy and Astrophysics

Astronomy

8

Binary Stars, Magnetohydrodynamic Stability, Mass Transfer, Stellar Mass Ejection, Adiabatic Conditions, Astronomical Models, Equilibrium, Main Sequence Stars, Mass Ratios, Roche Limit

Scientific paper

The equilibrium of a low-mass contact binary system is investigated by considering the stability of main-sequence components of 0.6 solar mass to both mass loss and mass gain. A contact system of equal masses is shown to be unstable to mass exchange on a dynamical time scale and to evolve rapidly into a detached system with a mass ratio of 0.8. As the system readjusts on a thermal time scale, it will either evolve into a nearly-contact stable system with this mass ratio or oscillate between two unstable nearly-contact states, spending most of the time as a nearly-contact unequal-mass system.

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