Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-09-28
Mon.Not.Roy.Astron.Soc. 356 (2005) 205-216
Astronomy and Astrophysics
Astrophysics
13 pages, 15 figures; MNRAS accepted
Scientific paper
10.1111/j.1365-2966.2004.08435.x
The hard X-ray lightcurves exhibit delays of $\sim 1$ s with respect to the soft X-ray lightcurves when the microquasar GRS 1915+105 is in the state of frequent, regular outbursts (states $\rho$ and $\kappa$ of Belloni et al. 2000). Such outbursts are supposed to be driven by the radiation pressure instability of the inner disc parts. The hard X-ray delays are then caused by the time needed for the adjustment of the corona to changing conditions in the underlying disc. We support this claim by the computation of the time evolution of the disc, including a non-stationary evaporation of the disc and mass exchange with the corona.
Czerny Bozena
Janiuk Agnieszka
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