Chandra Observations of WZ Sge in Superoutburst

Details Chandra Observations of WZ Sge in Superoutburst Chandra Observations of WZ Sge in Superoutburst

2004-12-07

arxiv.org/abs/astro-ph/0412166v1

Astronomy and Astrophysics

Astrophysics

6 pages including 5 figures; to be published in "The astrophysics of cataclysmic variables and related objects", ASP Conf. Ser

Scientific paper

We present seven separate Chandra observations of the 2001 superoutburst of WZ Sge. The high-energy outburst was dominated by intense EUV emission lines, which we interpret as boundary layer emission scattered into our line of sight in an accretion disc wind. The direct boundary layer emission was hidden from view, presumably by the accretion disc. The outburst orbital hump (OOH) was detected in the EUV, but the common superhump was not, indicating a geometric mechanism in the former and a dissipative mechanism in the latter. X-rays detected during outburst were not consistent with boundary layer emission and we argue that there must be a second source of X-rays in dwarf novae in outburst.

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