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International Astronomical Union Colloquium (1)

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Replaying the 2001 Outburst of WZ SGE
D. Steeghs
Journal:

International Astronomical Union Colloquium / Volume 194 / 2004

Published online by Cambridge University Press:

22 February 2018, pp. 178-179

Print publication:

2004
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I present the key results of extensive optical spectroscopy obtained during the first three weeks of the 2001 super-outburst of WZ Sge. A sequence of Doppler maps of the accretion flow in various lines was constructed, and used to create real-time movies of WZ Sge as it evolved through the outburst. Main results include the detection of two-armed spiral asymmetries in the disk, emission from the irradiated donor star and an extended stream of emission around day 19 of the outburst that bears the hallmarks of a mass-transfer burst event.