IUE observations of the 1987 superoutburst of the dwarf nova Z Cha

Details IUE observations of the 1987 superoutburst of the dwarf nova Z Cha IUE observations of the 1987 superoutburst of the dwarf nova Z Cha

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.187h&link_type=abstract

In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 187-190 (SEE N89-10682 01-89)

Astronomy and Astrophysics

Astronomy

Bursts, Dwarf Novae, Iue, Spaceborne Astronomy, Ultraviolet Astronomy, Periodic Variations, Ultraviolet Spectra

Scientific paper

Low resolution IUE observations of the dwarf nova Z Cha during superoutburst are presented. These cover most of the development of the outburst and have sufficient time resolution to probe continuum and line behavior on orbital phase. The observed modulation on this phase is very similar to that observed in the related object OY Car. The results imply the presence of a cool spot on the edge of the edge of the accretion disk, which periodically occults the brighter inner disk. Details of the line behavior suggest that the line originated in an extended wind-emitting region. In contrast to archive spectra obtained in normal outburst, the continuum is fainter and redder, indicating that the entire superoutburst disk may be geometrically thicker than during a normal outburst.

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