5 research outputs found
Remnants from Gamma-Ray Bursts
We model the intermediate time evolution of a "jetted" gamma-ray burst by two
blobs of matter colliding with the interstellar medium. We follow the
hydrodynamical evolution of this system numerically and calculate the
bremsstrahlung and synchrotron images of the remnant. We find that for a burst
energy of erg the remnant becomes spherical after years
when it collects of interstellar mass. This result is
independent of the exact details of the GRB, such as the opening angle. After
this time a gamma-ray burst remnant has an expanding sphere morphology. The
similarity to a supernova remnant makes it difficult distinguish between the
two at this stage. The expected number of non-spherical gamma-ray burst
remnants is per galaxy for a beaming factor of 0.01 and a burst
energy of erg. Our results suggest that that the double-shell object
DEM L 316 is not a GRB remnant.Comment: 16 pages, 9 figures, Substantial revisions, Accepted by Ap