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2003MNRAS.345...49W - Mon. Not. R. Astron. Soc., 345, 49-61 (2003/October-2)
The X-ray and extreme-ultraviolet flux evolution of SS Cygni throughout outburst.
WHEATLEY P.J., MAUCHE C.W. and MATTEI J.A.
Abstract (from CDS):
The transitions between X-ray and extreme-ultraviolet dominated emission are accompanied by intense variability in the X-ray flux, with time-scales of minutes. As detailed by Mauche & Robinson, dwarf nova oscillations are detected throughout the extreme-ultraviolet outburst, but we find they are absent from the X-ray light curve.
X-ray and extreme-ultraviolet luminosities imply accretion rates of 3x1015 g/s in quiescence, 1x1016 g/s when the boundary layer becomes optically thick, and ∼1018 g/s at the peak of the outburst. The quiescent accretion rate is two and a half orders of magnitude higher than predicted by the standard disc instability model, and we suggest this may be because the inner accretion disc in SS Cyg is in a permanent outburst state.
Abstract Copyright: 2003 RAS
Journal keyword(s): accretion, accretion discs - binaries: close - stars: dwarf novae - stars: individual: SS Cygni - novae, cataclysmic variables
Simbad objects: 6
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