ROSAT observation of the boundary layer between the white dwarf and the accretion disk of VW Hydri

Details ROSAT observation of the boundary layer between the white dwarf and the accretion disk of VW Hydri ROSAT observation of the boundary layer between the white dwarf and the accretion disk of VW Hydri

Jun 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991a%26a...246l..44b&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 246, no. 1, June 1991, p. L44-L46.

Astronomy and Astrophysics

Astronomy

43

Accretion Disks, Cataclysmic Variables, Dwarf Novae, Rosat Mission, White Dwarf Stars, X Ray Spectra, Proportional Counters, Radiant Flux Density, Sky Surveys (Astronomy)

Scientific paper

The first results are presented of an observation of the dwarf nova VW Hyi, in its quiescent state between outbursts, with the Position-Sensitive Proportional Counter on Rosat. The dwarf nova was detected at a count rate of 1.26 +/- 0.01 cts/s. Its spectrum is that of an optically thin plasma at a temperature of about 2.2 KeV, and the flux in the X-ray band is smaller than the flux observed in the optical and far-ultraviolet by almost an order of magnitude. An upper limit of 5 percent is given to amplitudes of sinusoidal flux variations at periods between 13 and 15 sec.

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