Speaker
Aksana Kurhuzava
Description
Large-scale cosmic emissions of explosive energy that occur during the explosions of certain supernovae or the merger of compact objects are called gamma-ray bursts. We study the radiation of the ultrarelativistic shell in the diffusion approximation, which takes place at the initial stage of a gamma-ray burst. We get the effective temperature, instantaneous and time-integrated spectra for the different distribution of the initial internal energy of the shell. The resulting time-integrated emission spectra of the shell photosphere contain a Band component and a thermal component. Also we considered the types of the equitemporal surfaces with a different type of the movement of the shell.
