Paula Szkody et al. 1999 ApJ 521 362 doi:10.1086/307550
Paula Szkody1,2, A. Linnell2, Kent Honeycutt3, Jeff Robertson4, Andrew Silber2,5, D. W. Hoard2,6, L. Pastwick2, V. Desai2, Ivan Hubeny7, John Cannizzo8, William Liller9, Ronald Zissell10 and Gary Walker11
Show affiliationsA complete 45 day supercycle of the cataclysmic variable V1159 Ori comprising a superoutburst and eight normal outbursts was observed. Coverage included ground-based optical observations as well as observations with RXTE for 38 days, ROSAT for 34 days, IUE for 27 days, and Extreme Ultraviolet Explorer (EUVE) for 10 days. The resulting light curves reveal that the optical and UV light variations are inversely correlated with the RXTE and ROSAT fluxes, with the largest change in intensity occurring in the ROSAT bandpass. There is no evidence for a strong EUV/soft X-ray component during outburst. An outflowing wind is evident from the C IV line profile during each brief outburst as well as the superoutburst. The transitions from outburst states of the disk to quiescent states take place on timescales of hours. Accretion disk models can fit the UV line and continuum energy distributions near outburst only if the disk radial temperature profile is modified from the standard case to produce a hotter distribution in the outer annuli. The high mass transfer rate, the hot disk distribution, and the similarity of outbursts and superoutbursts argue for outside-in outbursts in this system.
novae, cataclysmic variables; stars: individual (V1159 Orionis); ultraviolet: stars; X-rays: stars
Issue 1 (1999 August 10)
Received 1999 January 11, accepted for publication 1999 March 22
Paula Szkody et al. 1999 ApJ 521 362
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