Stochastic acceleration and nonthermal radiation in clusters of galaxies

被引：0
|
作者：
Blasi, P
Olinto, A
机构：
[1] Univ Chicago, Ctr Astron & Astrophys, Chicago, IL 60637 USA
[2] E Fermi Inst, Chicago, IL 60637 USA
来源：
HIGHLY ENERGETIC PHYSICAL PROCESSES AND MECHANISMS FOR EMISSION FROM ASTROPHYSICAL PLASMAS | 2000年 / 195期
关键词：
D O I：
暂无
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the possibility that the recently detected hard X-ray excess from some clusters of galaxies is due to bremsstrahlung emission of a nonthermal tail in the electron distribution produced by stochastic acceleration in a background of MHD waves. We find that this scenario requires an overall level of fluctuations which is only deltaB(2)/B-2 similar to 3% for a magnetic field B on the order of muG. Despite the reasonable values for these parameters, a large rate of injection of waves is needed to compensate the damping of the waves.
引用
收藏
页码：379 / 380
页数：2
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