Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987ap%26ss.131..625b&link_type=abstract
(IAU, Colloquium on Cataclysmic Variables. Recent Multi-Frequency Observations and Theoretical Developments, 93rd, Bamberg, West
Astronomy and Astrophysics
Astrophysics
11
Cataclysmic Variables, Emission Spectra, Stellar Mass Accretion, Stellar Mass Ejection, White Dwarf Stars, Bremsstrahlung, Cyclotron Radiation, Eddington Approximation, Light Curve, X Ray Spectra
Scientific paper
The emission regions on the white-dwarf primaries of AM Her type systems are suggested to be extended and offset from the magnetic pole in a way 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 bremmsstrahlung 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 greater than about 10 percent of the Eddington rate.
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