Dynamical Evolution of the RS CVn-type Binaries
Authors : Osman Demircan
Pages : 425-432
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Publication Date : 9999-12-31
Article Type : Makaleler
Abstract :The orbital angular momentum (orbital AM) of a sample of forty RS CVn-type binaries with the orbital periods P \leq 10 days were estimated and the orbital AM distribution with respect to P was critically interpreted as the orbital AM evolution of these systems caused by the magnetic breaking process with the existence of spin-orbit coupling. The empirical relations (between the orbital AM loss, mass loss and period variation) derived from the diagram of the orbital AM distribution were used in deriving a semi-empirical formula for the dynamical evolution of the RS CVn-type binaries. The magnetic breaking induced dynamical evolution of the RS CVn-type binaries maybe at different rates but is always towards the shorter periods in the existence of spin-orbit coupling and before the Roche lobe filling of a component star.Keywords : Turk. J. Phys., 23, (1999), 425-432. Full text: pdf Other articles published in the same issue: Turk. J. Phys., vol.23, iss.2.