Hard radio spectra from reconnection regions in galactic nuclei
Astrophysics
2009-11-06 v1
Abstract
Extremely flat and inverted radio spectra as observed in galactic nuclei and BL Lac sources are still a challenge for fast particle acceleration models. Continuous acceleration by electric fields in reconnection regions can result in almost constant particle distributions and thereby in inverted synchrotron spectra independent from the details of the injected spectrum. These spectra are calculated from a spatially averaged diffusion transport equation in momentum space that includes systematic momentum gains and losses as well as finite particle escape lifetimes.
Keywords
Cite
@article{arxiv.astro-ph/0106565,
title = {Hard radio spectra from reconnection regions in galactic nuclei},
author = {G. T. Birk and A. R. Crusius--Waetzel and H. Lesch},
journal= {arXiv preprint arXiv:astro-ph/0106565},
year = {2009}
}
Comments
14 pages, 2 figures, acc. for publ. in ApJ