@article{00349baf92024455ac5d8435a1679777,
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",
note = "Funding Information: This work was supported by an ISF grant for the Israeli Center for High Energy Astrophysics.",
year = "2008",
month = sep,
doi = "10.1142/S0218271808013200",
language = "אנגלית",
volume = "17",
pages = "1603--1610",
journal = "International Journal of Modern Physics D",
issn = "0218-2718",
publisher = "World Scientific",
number = "9",
}