Badjin 2010 伽马暴的伽马光子和周围环境的作用

主要内容:
这些作用包括光致电离、光致电离的加热、康普顿加热。这些过程可以产生一些非规则的X射线和光学辐射，用来解释目前看到的余辉的多样性。

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Title:		Modeling of the Interaction of GRB Prompt Emission with the Circumburst Medium
Authors:		Badjin, D. A.; Blinnikov, S. I.; Postnov, K. A.
Publication:		eprint arXiv:1008.4541
Publication Date:		08/2010
Origin:		ARXIV
Keywords:		Astrophysics - High Energy Astrophysical Phenomena
Comment:		27 pages, 16 colour figures, this version is translated by authors, so it differs from that, which is published in Astronomy Letters; Astron. Lett. 36 (2010) 687-706; doi:10.1134/S1063773710100014
Bibliographic Code:		2010arXiv1008.4541B

Abstract

We present methodology and results of numerical modeling of the interaction of GRB prompt emission with the circumburst medium using a modified version of the multi-group radiation hydrocode STELLA. The modification includes the nonstationary photoionization, the photoionization heating and the Compton heating along with the hydrodynamics and radiation transfer. The lightcurves and spectra of the outcoming gamma-ray, X-ray and optical emission are calculated for a set of models (shells) of the circumburst environment, which differ in dimensions, density, density profile, composition, temperature. In some cases total bolometric and optical luminosities can reach 10^47 and 10^43 erg/s respectively. These effects can be responsible for irregularities which are seen on lightcurves of some GRB's X-ray and optical afterglows.

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