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Paper: A magnetic field in AM CVn?
Volume: 157, Annapolis Workshop on Magnetic Cataclysmic Variables
Page: 393
Authors: El-Khoury, Walid; Li, Jianke
Abstract: AM CVn is believed to be an interacting binary with an accreting white dwarf primary and low-mass degenerate secondary. Theoretical models of its optical spectrum indicate that a plausible best fit to the observed spectrum is that of a viscous accretion disc with inner radius Rin 5 times 10^9 cm, greater than the radius of the primary. To account for the ``cut-off'' at the inner radius, we examine the possibility that accretion processes within Rin are affected by a magnetic field B sqiglt 106 G. To first order, the observations can be reasonably well-modelled by assuming that the binding energy of the accretion disc at Rin is released at the surface of the white dwarf primary as black-body radiation.
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