Collimation and Radiative Deceleration of Jets in TeV AGNs
Abstract
We consider some implications of the rapid X-ray and TeV variability observed in M87 and the TeV blazars. We outline a model for jet focusing and demonstrate that modest radiative cooling can lead to recollimation of a relativistic jet in a nozzle having a very small cross-sectional radius. Such a configuration can produce rapid variability at large distances from the central engine and may explain recent observations of the HST-1 knot in M87. Possible applications of this model to TeV blazars are discussed. We also discuss a scenario for the very rapid TeV flares observed with HESS and MAGIC in some blazars, that accommodates the relatively small Doppler factors inferred from radio observations.
Keywords
Cite
@article{arxiv.0712.2664,
title = {Collimation and Radiative Deceleration of Jets in TeV AGNs},
author = {Amir Levinson and Omer Bromberg},
journal= {arXiv preprint arXiv:0712.2664},
year = {2009}
}
Comments
5 pages. Proceedings of "High Energy Phenomena in Relativistic Outflows", held in Dublin, Ireland, September 24-28, 2007