Modeling of the Interaction of GRB Prompt Emission with the Circumburst Medium

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.

27 pages, 16 colour figures, this version is translated by authors, so it differs from that, which is published in Astronomy Letters

References in corpus (5)

• The Physics of Gamma-Ray Bursts
• The Supernova -- Gamma-Ray Burst Connection
• Pulsational pair instability as an explanation for the most luminous supernovae
• The Dynamics and Afterglow Radiation of Gamma-Ray Bursts. I. Constant Density Medium
• Energy Injection Episodes in Gamma Ray Bursts: The Light Curves and Polarization Properties of GRB 021004

Cited by in corpus (2)

• Thermal Emission in Gamma-Ray Burst Afterglows
• Passage of a Gamma-Ray Burst Through a Molecular Cloud: Cloud Ionization Structure