The effect of asynchronism on wind-driven mass transfer rates in the polars |
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| Authors: | C G Campbell |
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| Institution: | Department of Mathematics, University of Newcastle upon Tyne, Newcastle NE1 7RU |
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| Abstract: | An asynchronous magnetic white dwarf affects the rate of orbital evolution in AM Herculis binaries. An over-synchronous star leads to a positive orbital magnetic torque which reduces the rate of shrinkage of the secondary star's Roche lobe, and hence reduces the mass transfer rate. An opposing effect occurs as a result of the orbital angular momentum loss via secondary mass transfer in the absence of an accretion disc. The modification of the magnetic braking-driven synchronous mass transfer rate is calculated for a range of degrees of asynchronism, and its effect is compared at different orbital periods. |
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| Keywords: | accretion accretion discs magnetic fields binaries: close stars: magnetic fields white dwarfs |
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