Other
Scientific paper
Jul 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002hst..prop.9459s&link_type=abstract
HST Proposal ID #9459
Other
Hst Proposal Id #9459
Scientific paper
WZ Sge, the most extreme dwarf nova and one of the closest known cataclysmic variables, underwent a superoutburst in July 2001 after 22 years in quiescence. Because of the uniqueness of this event, two DD proposals were approved, one to observe the outburst itself, and another for us to observe the early decline phase. Here we propose to complete our fundamental study of the response of a dwarf nova system to an outburst by continuing our UV coverage of this most extreme outbursting system during its decline to quiescence. This decline is expected to take more than 3 yrs, with the most dramatic changes occurring in the first 2 years. The brightness of WZ Sge has made it possible for unprecedented multi-wavelength coverage with HST, Chandra, FUSE and ground-based optical. This once-in-a-lifetime chance to obtain high quality, high time {and spectral} resolution FUV data as the decline progresses into the critical transition from the disk- dominated phase to the bare white dwarf, provides an unique opportunity to study the response of the emerging white dwarf, whose chemical abundances, rotation and temperature variation with time bear the imprint of this extraordinary gigantic accretion event.
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