X-ray emission from dwarf novae

Details X-ray emission from dwarf novae X-ray emission from dwarf novae

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.187..777p&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 187, June 1979, p. 777-783. Research supported by the European Space Ag

Astronomy and Astrophysics

Astronomy

182

Novae, Stellar Radiation, White Dwarf Stars, X Ray Sources, Boundary Layers, Deposition, High Temperature, Optical Thickness

Scientific paper

The conditions under which the boundary layer between an accretion disk and a white dwarf can emit hard X-rays is examined with particular application to the observations of X-rays from dwarf novae. It is argued that for low accretion rates (no more than about 10 to the 16th g/s) hard X-ray emission is possible with temperatures up to about 200 million K. For higher accretion rates, hard X-ray emission is suppressed, and most of the radiation is emitted as soft X-rays with a temperature of about 200,000 to 500,000.

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