On the conversion of blast wave energy into radiation in active galactic nuclei and gamma-ray bursts

Details On the conversion of blast wave energy into radiation in active galactic nuclei and gamma-ray bursts On the conversion of blast wave energy into radiation in active galactic nuclei and gamma-ray bursts

1999-11-24

arxiv.org/abs/astro-ph/9911452v1

Astronomy and Astrophysics

Astrophysics

Astronomy and Astrophysics, in press

Scientific paper

It has been suggested that relativistic blast waves may power the jets of AGN and gamma-ray bursts (GRB). We address the important issue how the kinetic energy of collimated blast waves is converted into radiation. It is shown that swept-up ambient matter is quickly isotropised in the blast wave frame by a relativistic two-stream instability, which provides relativistic particles in the jet without invoking any acceleration process. The fate of the blast wave and the spectral evolution of the emission of the energetic particles is therefore solely determined by the initial conditions. We compare our model with existing multiwavelength data of AGN and find remarkable agreement.

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