The evolution of massive close binaries. III - The possibility of a tidal instability during the POST supernova phase

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Binary Stars, Main Sequence Stars, Orbital Elements, Stellar Evolution, Stellar Rotation, X Ray Stars, Circular Orbits, Gyration, Mass Transfer, Pulsars, Radiation Pressure, Stellar Mass, Supernovae, X Ray Binaries, X Ray Sources

Scientific paper

Effects of stellar evolution and tidal interaction on the periods of massive close X-ray binaries during post-supernova evolution are discussed. The orbit is assumed recircularized and synchronized after a certain time. Conditions required in order that tidal forces maintain or restore synchronism are examined. Conditions for collision of the binary system components are also considered. System instability resulting from changes in the structure of the primary, or from transfer of angular momentum from the orbital motion into the rotation or vice versa, are examined. Radiation pressure effects are considered. A test in future observations is stated with respect to circularization of the orbit and tidal evolution.

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