Disk Developement in U Gem from One Outburst to the Next

Details Disk Developement in U Gem from One Outburst to the Next Disk Developement in U Gem from One Outburst to the Next

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984iue..prop.1888s&link_type=abstract

IUE Proposal ID #IBGPS

Computer Science

Scientific paper

A direct test of current disk instability models will be accomplished through IUE and optical observations of the disk changes of a dwarf nova during a long quiescent interval from one outburst to the next. To insure that the entire disk will be involved and the ionization zone has the maximum change, a long outburst period, low mass transfer system is needed. U Gem fulfills these criteria and is also ideal because it is among the brightest of the dwarf novae, has well known UV, optical and IR properties, and has a high inclination. The mean quiescent interval is near 4 months. One SWP and 2 LWR low dispersion spectra (taking onehalf shift) approximately every 2 weeks during this interval (with ground based spectroscopy during this same interval) will provide the necessary information about the boundary layer and ionization zone changes.

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