Journal Article

Scalings of the synchrotron cut-off and turbulent correlation of active galactic nucleus jets

Mitsuru Honda

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 409, issue 3, pages 1120-1126
Published in print December 2010 | ISSN: 0035-8711
Published online December 2010 | e-ISSN: 1365-2966 | DOI: http://dx.doi.org/10.1111/j.1365-2966.2010.17367.x
Scalings of the synchrotron cut-off and turbulent correlation of active galactic nucleus jets

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We propose a new analytic scaling of the cut-off frequency of synchrotron radiation from active galactic nucleus (AGN) jets that are non-uniformly filled with many filaments. The theoretical upper limit is provided independent of magnetic intensity, spectral index, coherence, correlation length of filamentary turbulence, etc., such that νc≃ 6 × 1020δ[(r− 1)/r]4/3 (b/10−4) Hz, where δ, r and b are the Doppler beaming factor, shock-compression ratio and energy-density ratio of the perturbed/local mean magnetic field of the filaments, respectively. Combining our results with observational data for 18 extragalactic sources, a constraint on the filament correlation length is found, in order to give the number scaling of filaments. The results suggest that, in particular, the jets of compact BL Lacs possess a large number of filaments with transverse size scale smaller than the emission-region size. The novel concept of the quantization of flowing plasma is suggested.

Keywords: acceleration of particles; radiation mechanisms: non-thermal; turbulence; methods: analytical; galaxies: evolution; galaxies: jets

Journal Article.  5572 words.  Illustrated.

Subjects: Astronomy and Astrophysics

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