X-rays from non-magnetic cataclysmic variables.

Details X-rays from non-magnetic cataclysmic variables. X-rays from non-magnetic cataclysmic variables.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc...93v&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 93 - 101

Astronomy and Astrophysics

Astrophysics

7

Cataclysmic Binaries: X Rays, Cataclysmic Binaries: Extreme Uv, Cataclysmic Binaries: White Dwarfs

Scientific paper

Observations with ROSAT and EUVE of non-magnetic cataclysmic variables are reviewed. Eclipses of the X-rays, outburst lightcurves, pulsation periods, and dependence of X-ray luminosity on inclination all indicate that the X-rays in non-magnetic cataclysmic variables are produced in a small region close to the white dwarf. The X-ray spectra show a hard and a soft component, whose temperatures remain constant as their fluxes change by more than an order of magnitude. This suggests that a two-temperature instability regulates their respective fluxes. The ratio of X-ray to optical/ultraviolet luminosity is inversely correlated to the accretion rate onto the white dwarf.

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