The expected photospheric emission of GRBs in the internal shock model

Details The expected photospheric emission of GRBs in the internal shock model The expected photospheric emission of GRBs in the internal shock model

2003-03-13

arxiv.org/abs/astro-ph/0303288v1

Astronomy and Astrophysics

Astrophysics

4 pages, 6 figures, to appear in "Gamma-ray bursts in the afterglow era", 3rd workshop, Rome 17-20 Sept. 2002

Scientific paper

The prompt emission of gamma-ray bursts (hereafter GRBs) probably comes from a highly relativistic wind which converts its kinetic energy into radiation via the formation of shocks within the wind itself. Such "internal shocks" can occur if the wind is generated with a highly non uniform distribution of the Lorentz factor Gamma. Taking into account such a variable distribution of Gamma, we estimate the expected thermal emission of the relativistic wind when it becomes transparent. We compare this emission (temporal profile + spectrum) to the emission produced by the internal shocks. In most cases we predict a rather bright thermal emission that could easily be detected. This favors acceleration mechanisms for the wind where the main energy reservoir is under magnetic rather than thermal form. Such scenarios can produce thermal X-ray precursors comparable to those observed by GINGA and WATCH/GRANAT.

Affiliated with

Also associated with

No associations

Rating

The expected photospheric emission of GRBs in the internal shock model does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with The expected photospheric emission of GRBs in the internal shock model, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The expected photospheric emission of GRBs in the internal shock model will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-562566