Mathematics – Logic
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...199.1202p&link_type=abstract
American Astronomical Society, 199th AAS Meeting, #12.02; Bulletin of the American Astronomical Society, Vol. 33, p.1326
Mathematics
Logic
2
Scientific paper
We consider a jet-disk symbiosis model to explain GRBs, their afterglows, and their cosmological evolution. In our model, GRBs are created inside a pre-existing jet from a neutron star in a binary system which collapses to a black hole due to accretion. We use well established concepts and data from jets and disks in AGN and stellar binary systems, such as the Galactic jet source SS433. We propose that such sources are the precursors. The observed emission is due to synchroton emission from ultrarelativistic shock waves propagating along the jet; we can reproduce the typical observed afterglow emission flux and spectrum as a function of the time. We use the Star Formation Rate (SFR) distribution as a function of the redshift to obtain the fluence distribution of GRBs (both long and short duration) in our model. We found that in the context of our model, it is close to impossible to have any contribution from GRBs to either the extragalactic or galactic cosmic rays. We obtain a very low predicted flux for the neutrino background. As a further step, we distinguish between GRBs with long and short gamma ray emission durations. We investigate whether one of the two components could be more directly related with the SFR distribution and whether one of them could give a higher contribution than the other one to the galactic and extragalactic cosmic ray spectra. Our model can fit both components well, confirming that while long GRBs dominate in the soft region of the fluence distribution, the short ones are concentrated in the hard fluence region. The higher number of long GRBs detected compared with the short ones explains why in our model long GRBs give more contribution to the CR spectra.
Biermann Peter L.
Falcke Heino
Pugliese Giovanna
Wang Yadong
No associations
LandOfFree
A jet model for Gamma Ray Bursts: Cosmological implications does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A jet model for Gamma Ray Bursts: Cosmological implications, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A jet model for Gamma Ray Bursts: Cosmological implications will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1229452