HEAD Division Meeting 1999, April 1999
Session 24. Blazars
Oral, Tuesday, April 13, 1999, 4:30pm-6:02pm, Colonial Room

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[24.03] Shock Acceleration in Blazar Jets

A. Mastichiadis (Physics Department, University of Athens, Athens, Greece), J.G. Kirk (Max-Planc-Institut fuer Kernphysik, Heidelberg, Germany)

The recent multiwavelength observations of Active Galactic Nuclei have revealed many interesting patterns in the emission of these objects across the EM spectrum. In the present we examine the flaring behavior of the TeV blazars by adopting a simple shock-in-jet model. The electrons are accelerated in an advancing shock and cool by synchrotron and inverse Compton radiation. We show that the characteristics of the flares (rise and fall timescales, spectral slope, as well as soft/hard time-lags) depend on the interplay between the acceleration and cooling timescales. We present examples of different types of flares and discuss various observational tests that could, in principle, strengthen our shock acceleration hypothesis.


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