Hard radio, spectra from reconnection regions in Galactic nuclei

被引：23

作者：

Birk, GT

Crusius-Wätzel, AR

Lesch, H

机构：

[1] Univ Munich, Inst Astron & Astrophys, D-81679 Munich, Germany

[2] Ctr Interdisciplinary Plasma Sci, Garching, Germany

来源：

ASTROPHYSICAL JOURNAL | 2001年 / 559卷 / 01期

关键词：

acceleration of particles; BL Lacertae objects : general; galaxies : nuclei; MHD; radio continuum : galaxies;

D O I：

10.1086/322394

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

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 therefore in inverted synchrotron spectra independent of the details of the injected spectra. 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.

引用

页码：96 / 100

页数：5

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