Speed-up of diffusive shock acceleration and its implications for AGN and GRBs

Details Speed-up of diffusive shock acceleration and its implications for AGN and GRBs Speed-up of diffusive shock acceleration and its implications for AGN and GRBs

Jun 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aipc..516..369b&link_type=abstract

26th International Cosmic Ray Conference Proceedings, vol. 4, page 369-371

Computer Science

Scientific paper

The rate of Diffusive shock accleration is considerably enhanced relative to that given by non-relativistic theory when the upstream plasma flow has a Lorentz factor of ten or more. This fact yields a major modification to the particle production in the central accretion shocks of AGN. We compute the expected neutrino, proton and gamma-ray output from regions within 100 Schwarzschild radii of the black hole including p-gamma, p and n matter and synchrotron losses and find that taking into account lower energy processes modifies previous conclusions. The ability to see variability from this central engine via gamma-ray observations is discussed. We compute Monte-Carlo shock acceleration rates derived for large Lorentz factors relevant to the cosmic fire-balls thought to produce gamma-bursts.

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