Fermi Gamma-ray Space Telescope

Radiative transfer simulations for thermal radiation from GRB jet

Sanshiro Shibata
Nozomu Tominaga

Abstract:

Recently, thermal radiation from gamma-ray burst (GRB) jets attracts attention as the origin of the GRB prompt emission. It is expected that the spectrum and the light curve of thermal radiation from GRB jet is complicated because the jet itself has a very complicated structure.Thus, in order to treat the thermal radiation from GRB jets properly, both the radiative transfer in the jets and the complicated inner structures of the jets should be taken into account. We developed a numerical code to calculate the radiative transfer in relativistic jets, based on the Monte Carlo method. The code enables us to calculate the electron scatterings as a postprocessing in relativistic jets with complicated structures obtained by 2D relativistic hydrodynamical simulations. We will present the results of the calculations.