Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2010-08-26
Astron. Lett. 36 (2010) 687-706
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
27 pages, 16 colour figures, this version is translated by authors, so it differs from that, which is published in Astronomy L
Scientific paper
10.1134/S1063773710100014
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.
Badjin D. A.
Blinnikov Sergei I.
Postnov Konstantin A.
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