Hard radio spectra from reconnection regions in galactic nuclei

Details Hard radio spectra from reconnection regions in galactic nuclei Hard radio spectra from reconnection regions in galactic nuclei

2001-06-29

arxiv.org/abs/astro-ph/0106565v1

Astronomy and Astrophysics

Astrophysics

14 pages, 2 figures, acc. for publ. in ApJ

Scientific paper

10.1086/322394

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.

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