Hydrodynamical evolution and their light curves for a new GRB-Afterglow modal

Abstract

Abstract A model of a hydrodynamic evolution of an external shock produced by the deceleration of a relativistic jet ejected by a progenitor of the gamma ray burst is proposed and studied. The model shows new aspects and gives the most realistic description of the radiation energy produced by the fireball. The properties of the light curve of the GRB-Afterglows are also discussed.