X-ray emission from dwarf novae
Open Access
- 1 August 1979
- journal article
- research article
- Published by Oxford University Press (OUP) in Monthly Notices of the Royal Astronomical Society
- Vol. 187 (4) , 777-783
- https://doi.org/10.1093/mnras/187.4.777
Abstract
We examine the conditions under which the boundary layer between an accretion disc and white dwarf can emit hard X-rays with particular application to the observations of X-rays from dwarf novae. We argue that for low accretion rates |$(\lesssim\,{10}^{16}\text{g}\,\text{s}^{-1)}$| hard X-ray emission is possible with temperatures up to |$\sim {2\times 10}^{8}\text{K}$|. For higher accretion rates, hard X-ray emission is suppressed, and most of the radiation is emitted as soft X-rays with temperature |$\sim {2-5\times 10}^{5}\text{K}$|.Keywords
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