Stellar evolution, GRB and their hosts
Faculty of Physics, Moscow State University, 119899 Moscow, Russia
2 Sternberg Astronomical Institute, Moscow State University, 119899 Moscow, Russia
Accepted: 1 June 1999
We compute the GRB rates in different types of galaxies by performing a population synthesis using the "Scenario Machine” code in the framework of merging binary relativistic stars model. Our model predicts that of GRB should occur in elliptical galaxies, and this fraction should increase with the redshift. This fraction is comparable with the observed fraction of GRB without (detectable) X-ray afterglows.
Key words: gamma-rays: bursts
© European Southern Observatory (ESO), 1999