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Multi-Wavelength Afterglows in Gamma-Ray Bursts: Refreshed Shock and Jet Effects

A. Panaitescu·P. Meszaros·M. J. Rees
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Abstract

We present an analytical approach to calculate the hydrodynamics of the interaction between a relativistic ejecta and a surrounding medium, whose evolution serves as a model for Gamma-Ray Burst afterglows. We investigate the effect of the relevant model parameters on the X-ray, optical and radio fluxes, and the effect of a refreshed shock energy input and anisotropy in the ejecta on the shape of the light curves. We compare our numerical results to observed afterglows and give a quantitative description of the conditions (geometry and physical parameters) in the ejecta that are compatible with the light curves of the 970508 afterglow, for which a large number of accurate flux measurements are available.

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A. Panaitescu, P. Meszaros, M. J. Rees. 1998-05-02. Multi-Wavelength Afterglows in Gamma-Ray Bursts: Refreshed Shock and Jet Effects. https://doi.org/10.1086/305995

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