The stream impact region in the disc of WZ SGE

Details The stream impact region in the disc of WZ SGE The stream impact region in the disc of WZ SGE

Sep 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998mnras.299..768s&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 299, Issue 3, pp. 768-776.

Astronomy and Astrophysics

Astronomy

47

Accretion, Accretion Discs, Hydrodynamics, Stars: Individual: Wz Sge, Novae, Cataclysmic Variables

Scientific paper

We report the observation of new features in the spectrum of the cataclysmic variable WZ Sge. The disc eclipse is seen as a well-defined structure in the Hα line. From phases 0.25 to 0.5 an absorption feature of the same shape as the emission S wave is seen in this line, but redshifted by ~200 kms^-1. Two possible interpretations of this feature are given, both of which imply that it originates at the impact point of the stream on the disc edge. In addition, evidence is found for substructure in the velocity map of the spot. Emission from line-emitting post-shock material, extending to about 60 deg downstream from the continuum hotspot, is seen in the Doppler map in the form of a tail extending from the hotspot. A theoretical estimate shows that such a tail is to be expected as a consequence of the post-impact hydrodynamics of the stream. A new determination of the system parameters is made. They agree with those of Gilliland et al.; in particular, the data support a high primary mass. The variation of Hα surface brightness with distance from the primary is flatter, in the inner regions, than the r^-1.5 dependence found by Horne for other cataclysmic variables in quiescence.

Affiliated with

Also associated with

No associations

Rating

The stream impact region in the disc of WZ SGE does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The stream impact region in the disc of WZ SGE, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The stream impact region in the disc of WZ SGE will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1711816