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Properties of the Emission Regions in AM Her Stars

Published online by Cambridge University Press:  12 April 2016

K. Beuermann
K. Beuermann*
Affiliation:
Institut für Astronomie und Astrophysik Technische , Universität Berlin, Berlin, F.R.G.

Abstract

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The emission regions on the white-dwarf primaries of AM Her type systems are suggested to be extended and offset from the magnetic pole similar to the oval arc of emission formed by the Earth’s auroral zone. In ST LMi and EF Eri, the emitting areas of the bremsstrahlung, the soft X-ray, and the cyclotron sources are shown to display a hierarchy with a small bremsstrahlung core being surrounded by a larger cyclotron halo. Core and halo are characterized by large differences in specific accretion rate with that in the bremsstrahlung core corresponding to a sizable fraction (≳10%) of the Eddington rate.

Type
VI. Magnetic Cataclysmic Systems
Information
International Astronomical Union Colloquium , Volume 93: Cataclysmic Variables: Recent Multi-Frequency Observations and Theoretical Developments , 1987 , pp. 625 - 629
Copyright
Copyright © Reidel 1987

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