Petar 2008 MHD simulation for GRB and its afterglow

主要内容:
RMHD study, including synchrotron radiation simulation.

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文章信息:

· arXiv e-print (arXiv:0801.1325)

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Title:		An RMHD study of transition between prompt and afterglow GRB phases
Authors:		Mimica, Petar; Giannios, Dimitrios; Aloy, Miguel-Angel
Publication:		eprint arXiv:0801.1325
Publication Date:		01/2008
Origin:		ARXIV
Keywords:		Astrophysics
Comment:		10 pages, 3 figures, proceedings of the conference "Supernovae: lights in the darkness", October 3-5, 2007, Mao (Menorca)
Bibliographic Code:		2008arXiv0801.1325M

Abstract

We study the afterglow phases of a GRB through relativistic magnetohydrodynamic simulations. The evolution of a relativistic shell propagating into a homogeneous external medium is followed. We focus on the effect of the magnetization of the ejecta on the initial phases of the ejecta-external medium interaction. In particular we are studying the condition for the existence of a reverse shock into the ejecta, the timescale for the transfer of the energy from the shell to the shocked medium and the resulting multiwavelength light curves. To this end, we have developed a novel scheme to include non-thermal processeses which is coupled to the relativistic magnetohydrodynamic code MRGENESIS in order to compute the non-thermal synchrotron radiation.

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