On the conversion of blast wave energy into radiation in AGN and GRBs

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Radiation Mechanisms, Polarization, Active And Peculiar Galaxies And Related Systems, Gamma-Ray Sources, Gamma-Ray Bursts

Scientific paper

We address the important issue how the kinetic energy of collimated blast waves in AGN and GRBs 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 condition. We compare our model with existing multiwavelength data of AGN and find remarkable agreement. .

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