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Properties of the emission regions in AM Her stars

  • Magnetic Cataclysmic Systems
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Abstract

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.

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Authors and Affiliations

  1. Institut für Astronomie und Astrophysik Technische, Universität Berlin, Berlin, Germany

    K. Beuermann

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  1. K. Beuermann
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Beuermann, K. Properties of the emission regions in AM Her stars. Astrophys Space Sci 131, 625–629 (1987). https://doi.org/10.1007/BF00668147

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  • DOI: https://doi.org/10.1007/BF00668147

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