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.

5 pages. Proceedings of "High Energy Phenomena in Relativistic Outflows", held in Dublin, Ireland, September 24-28, 2007

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Cited by in corpus (5)

• Rapid TeV variability in Blazars as result of Jet-Star Interaction
• Transformation of the Poynting flux into the kinetic energy in relativistic jets
• Recollimation and Radiative Focusing of Relativistic Jets: Applications to Blazars and M87
• Reconfinement of highly magnetized jets: Implications for HST-1 in M87
• MOJAVE -- XXII. Brightness temperature distributions and geometric profiles along parsec-scale AGN jets