Collimation and radiative deceleration of jets in TeV AGNs

A. Levinson; O. Bromberg

doi:10.1142/S0218271808013200

Collimation and radiative deceleration of jets in TeV AGNs

A. Levinson^*, O. Bromberg

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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 H.E.S.S. and MAGIC in some blazars, that accommodates the relatively small Doppler factors inferred from radio observations.

Original language	English
Pages (from-to)	1603-1610
Number of pages	8
Journal	International Journal of Modern Physics D
Volume	17
Issue number	9
DOIs	https://doi.org/10.1142/S0218271808013200
State	Published - Sep 2008

Keywords

Active galaxies
BL Lacertae objects
Gamma-rays
Jets
Nonthermal radiation mechanism

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title = "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 H.E.S.S. and MAGIC in some blazars, that accommodates the relatively small Doppler factors inferred from radio observations.",

keywords = "Active galaxies, BL Lacertae objects, Gamma-rays, Jets, Nonthermal radiation mechanism",

author = "A. Levinson and O. Bromberg",

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AU - Bromberg, O.

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PY - 2008/9

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N2 - 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 H.E.S.S. and MAGIC in some blazars, that accommodates the relatively small Doppler factors inferred from radio observations.

AB - 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 H.E.S.S. and MAGIC in some blazars, that accommodates the relatively small Doppler factors inferred from radio observations.

KW - Active galaxies

KW - BL Lacertae objects

KW - Gamma-rays

KW - Jets

KW - Nonthermal radiation mechanism

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JO - International Journal of Modern Physics D

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Collimation and radiative deceleration of jets in TeV AGNs

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