Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..211v&link_type=abstract
International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 211 - 212
Astronomy and Astrophysics
Astrophysics
Stellar Atmospheres: White Dwarfs, Cataclysmic Binaries: X Rays, Cataclysmic Binaries: Fluorescence
Scientific paper
In magnetic cataclysmic variables a magnetic white dwarf accretes matter from a late-type companion star (see e.g. Cropper 1990). The accreted matter falls along the magnetic field lines onto the magnetic poles of the white dwarf, where the accretion flow passes a shock near the white dwarf surface. The post-shock material is heated to several times 10 keV and cools by radiating infrared and optical cyclotron radiation and hard X-ray thermal bremsstrahlung, which irradiate the white dwarf surface. Hard X-ray irradiation implies the presence of 6.4 keV iron Kα fluorescence lines and a Compton reflection component in the X-ray spectra of these systems. The authors present a few results of self-consistent numerical calculations of the reflected hard X-ray spectrum and the iron Kα fluorescence complex for irradiated white-dwarf atmospheres (van Teeseling et al. 1996).
Heise Jaret
Kaastra Jelle S.
van Teeseling Andre
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