The Origin of Soft X-rays in DQ Herculis

Details The Origin of Soft X-rays in DQ Herculis The Origin of Soft X-rays in DQ Herculis

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.6211m&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #62.11; Bulletin of the American Astronomical Society, Vol. 33, p.1401

Astronomy and Astrophysics

Astronomy

Scientific paper

DQ Herculis (=Nova Herculis 1934) is a deeply eclipsing cataclysmic variable containing a magnetic white dwarf primary. The spin of the white dwarf is indirectly detected in the optical as a 71-s oscillation, which is believed to be due to reprocessing in the accretion disk of X-ray and EUV radiations from the poles. The accretion disk is thought to block our line of sight to the white dwarf at all orbital phases. Nevertheless, soft X-rays have been detected from DQ Her with ROSAT PSPC. We present preliminary results of our Chandra ACIS imaging observations of DQ Her, confirming the ROSAT detection. The point-like X-ray source exhibits a partial eclipse which is shallow but flat-bottomed. We discuss the possible location and size of the X-ray emitting region(s).

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