Disk Diffusion Propagation Model for the Outburst of XTE J1118+480

Details Disk Diffusion Propagation Model for the Outburst of XTE J1118+480 Disk Diffusion Propagation Model for the Outburst of XTE J1118+480

2001-08-10

arxiv.org/abs/astro-ph/0108189v1

Astronomy and Astrophysics

Astrophysics

26 pages, 6 figures, accepted for publication in ApJ

Scientific paper

10.1086/323768

We present a linear diffusion model for the evolution of the double-peaked outburst in the transient source XTEJ1118+480. The model treats the two outbursts as episodic mass deposition at the outer radius of the disk followed by evolution of disk structure according to a diffusion process. We demonstrate that light curves with fast-rise, exponential decay profile are a general consequence of the diffusion process. Deconvolution of the light curve proves to be feasible and gives an input function specifying mass deposition at the outer disk edge as well as the total mass of the disk, both as functions of time. The derived evolution of total disk mass can be correlated with the observed evolution of the ~0.1 Hz QPO in the source reported in Wood et al. (2000).

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