Astronomy and Astrophysics – Astrophysics – High Energy Astrophysical Phenomena
Scientific paper
2010-06-28
Fermi meets Jansky Proceedings, Eds. T. Savolainen, E. Ros, R.W. Porcas, J.A. Zensus, MPIfR Bonn, 2010, p 57
Astronomy and Astrophysics
Astrophysics
High Energy Astrophysical Phenomena
4 pages, 2 figures, some minor errors corrected compared to proceedings version
Scientific paper
We present a model in which AGN jets are described by a dense series of plasma blobs, distributed in masses and velocities. The blobs expand and collide, and ultimately form a continuous jet flow as observed on larger scales. When blobs collide, energetic electrons are produced by first order Fermi acceleration, and emit synchrotron radiation at the radio-optical frequencies with a double-broken power law spectrum. The difference of this model to the well-known Marscher&Gear-model is, that in our model shocks are produced on a range of scales, and exist only temporarily, which causes differences in the prediction for the spectral evolution of flares. We apply our model to radio-submm data obtained for 3C454.3, and briefly discuss implications for gamma-ray production.
Häberlein Max
Krichbaum Thomas
Rachen Jorg P.
Reimold Felix
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