Evolution of spiral shocks in U Gem during outburst

Details Evolution of spiral shocks in U Gem during outburst Evolution of spiral shocks in U Gem during outburst

2001-02-23

arxiv.org/abs/astro-ph/0102416v1

Astronomy and Astrophysics

Astrophysics

12 pages, 2 figures, submitted to ApJ Letters

Scientific paper

10.1086/319826

Time resolved spectroscopic observations of U Gem during its March 2000
outburst show strong spiral shocks in the accretion disk. During the plateau at
maximum brightness the spiral shocks contribute 14% to the total He II flux.
The two arms of the spiral show a distinctly different evolution during the
outburst and decline, which indicates an asymmetric evolution in the disk.

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