Internal shock model for the X-ray flares of Swift J1644+57

Details Internal shock model for the X-ray flares of Swift J1644+57 Internal shock model for the X-ray flares of Swift J1644+57

2011-12-17

arxiv.org/abs/1112.4038v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

6 pages, 3 figures, accepted for publication in MNRAS

Scientific paper

Swift J1644+57 is an unusual transient event, likely powered by the tidal disruption of a star by a massive black hole. There are multiple short timescales X-ray flares were seen over a span of several days. We propose that these flares could be produced by internal shocks. In the internal shock model, the forward and reverse shocks are produced by collisions between relativistic shells ejected from central engine. The synchrotron emission from the forward and reverse shocks could dominate at two quite different energy bands under some conditions, the relativistic reverse shock dominates the X-ray emission and the Newtonian forward shock dominates the infrared and optical emission. We show that the spectral energy distribution of Swift J1644+57 could be explained by internal shock model.

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