Gravitational collapse as the source of gamma-ray bursts

Details Gravitational collapse as the source of gamma-ray bursts Gravitational collapse as the source of gamma-ray bursts

2008-05-21

arxiv.org/abs/0805.3262v1

Astronomy and Astrophysics

Astrophysics

12 pages, no figures. To be published in Proceedings of the Conference "Problems of Practical Cosmology", see http://ppc08.a

Scientific paper

If the threshold for $e^{-}e^{+}$ pair production depends on an angle between photon momenta, and if the $\gamma$-rays are collimated right in gamma-ray burst (GRB) source then another solution of the compactness problem is possible. The list of basic assumptions of the scenario describing the GRB with energy release $< 10^{49}$ erg is adduced: the matter is about an alternative to the ultrarelativistic fireball if all long-duration GRBs are physically connected with core-collapse supernovae (SNe). The questions about radiation pressure and how the jet arises on account of even a small radiation field asymmetry in a compact GRB source of size $\lesssim 10^8$ cm, and observational consequences of the compact model of GRBs are considered.

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