S E M I N A R IDepartament d'Astronomia i Astrofísica
Universitat de València
Gamma-ray bursts : central engine and emission mechanisms
Université Paris 6 / Institut d'Astrophysique de Paris
Seminari del departament d'Astronomia i Astrofísica
Dijous 12 febrer 2004
I will first review the main observational properties of gamma-ray bursts and their afterglows. Then I will present the following three-steps scenario : (1) the initial event responsible for the energy release and the relativistic ejection ; (2) the production of the prompt gamma-rays ; (3) the deceleration of the relativistic ejecta by the surrounding medium and the emission of the afterglow. I will focus on some recent results on the simulation of the central engine.