Statistics – Computation
Scientific paper
Apr 1986
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986mnras.219..589c&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 219, April 1, 1986, p. 589-596.
Statistics
Computation
15
Binary Stars, Magnetic Diffusion, Stellar Mass Accretion, Stellar Rotation, Synchronism, White Dwarf Stars, Angular Velocity, Computational Astrophysics, Magnetic Moments, Orbital Elements, Red Dwarf Stars, Stellar Evolution
Scientific paper
Conditions are derived for which the white dwarf component in an AM Herculis binary can attain synchronism with the orbit in the presence of accretion. A stable locking mechanism must exist and, for the case of an initially over-synchronous white dwarf, there is a maximum value of the magnetic diffusivity of the secondary, η0, above which exact corotation cannot be attained. In the absence of a locking mechanism the primary will reach a slightly asynchronous state with a typical synodic period of a few tens of years. If η is significantly less than η0 the instantaneous angular velocity of the primary in this state will vary about a central value.
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