Phenomenology of Gamma-Ray Jets

Details Phenomenology of Gamma-Ray Jets Phenomenology of Gamma-Ray Jets

2007-09-10

arxiv.org/abs/0709.1337v1

AIP Conf.Proc.968:281-287,2008

Astronomy and Astrophysics

Astrophysics

Proceedings, Huangshan meeting on "Astrophysics of Compact Objects"

Scientific paper

10.1063/1.2840414

We discuss some phenomenological aspects of $\gamma$-ray emitting jets. In particular, we present calculations of the $\gamma$-sphere and $\pi$-sphere for various target photon fields, and employ them to demonstrate how $\gamma$-ray observations at very high energies can be used to constraint the Doppler factor of the emitting plasma and the production of VHE neutrinos. We also consider the implications of the rapid TeV variability observed in M87 and the TeV blazars, and propose a model for the very rapid TeV flares observed with HESS and MAGIC in some blazars,that accommodates the relatively small Doppler factors inferred from radio observations. Finally, we briefly discuss the prospects for detecting VHE neutrinos from relativistic jets.

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