出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We study the afterglow phases of a GRB through relativistic magnetohydrodynamic simulations.
The evolution of a relativistic shell propagating into a homogeneous external medium is followed.
We focus on the effect of the magnetization of the ejecta on the initial phases of the ejecta-external
medium interaction. In particular we are studying the condition for the existence of a reverse
shock into the ejecta, the timescale for the transfer of the energy from the shell to the shocked
medium and the resulting multiwavelength light curves. To this end, we have developed a novel
scheme to include non-thermal processes which is coupled to the relativistic magnetohydrodynamic
code MRGENESIS in order to compute the non-thermal synchrotron radiation.
