Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2009-07-05
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
15 pages, 7 figures, accepted to MNRAS
Scientific paper
Nuclear and Coulomb collisions in GRB jets create a hot electron-positron plasma. This collisional heating starts when the jet is still opaque and extends to the transparent region. The e+- plasma radiates its energy. As a result, a large fraction of the jet energy is converted to escaping radiation with a well-defined spectrum. The process is simulated in detail using the known rates of collisions and accurate calculations of radiative transfer in the expanding jet. The result reproduces the spectra of observed GRBs that typically peak near 1 MeV and extend to much higher energies with a photon index \beta ~ -2.5. This suggests that collisional heating may be the main mechanism for GRB emission.
No associations
LandOfFree
Collisional mechanism for GRB emission 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 Collisional mechanism for GRB emission, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Collisional mechanism for GRB emission will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-187189