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Particle acceleration in Blazars

Published online by Cambridge University Press:  08 June 2011

Matthias Weidinger  and
Felix Spanier
Matthias Weidinger
Affiliation:
Lehrstuhl für Astronomie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany email: [email protected]
Felix Spanier
Affiliation:
Lehrstuhl für Astronomie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany email: [email protected]
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Abstract

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Understanding the variable emission of blazars observed with gamma-ray telescopes and Fermi has become a major challenge for theoretical models of particle acceleration. Here, we introduce a novel time-dependent emission model in which the maximum energy of particles is determined from a balance between Fermi type I and II acceleration energy gains and radiative energy losses, allowing for an explanation of both the characteristic spectral energy distribution of blazars and their intrinsic sub-hour variability. Additionally, we can determine the physical condition of the emitting plasma concerning its turbulence and typical shock speeds.

Keywords

acceleration of particlesshock wavesradiation mechanisms: nonthermalgalaxies: activegalaxies: jetsBL Lacertae objects: individual (1 ES 1218+30.4, PKS 2155-304)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S274: Advances in Plasma Astrophysics , September 2010 , pp. 263 - 266
Copyright
Copyright © International Astronomical Union 2011

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