Nonthermal emission associated with strong agn outbursts at the centers of galaxy clusters

被引：53

作者：

Fujita, Yutaka ^{[1
]}

Kohri, Kazunori

Yamazaki, Ryo

Kino, Motoki

机构：

[1] Osaka Univ, Dept Earth & Space Sci, Grad Sch Sci, Toyonaka, Osaka 5600043, Japan

[2] Harvard Smithsonian Ctr Astrophys, Inst Theory & Computat, Cambridge, MA 02138 USA

[3] Univ Lancaster, Dept Phys, Lancaster LA1 4YB, England

[4] Hiroshima Univ, Dept Phys, Hiroshima 7398526, Japan

[5] JAXA, Inst Space & Astronaut Sci, Sagamihara, Kanagawa 2298510, Japan

来源：

ASTROPHYSICAL JOURNAL | 2007年 / 663卷 / 02期

关键词：

acceleration of particles; galaxies : active; galaxies : clusters : general; galaxies : clusters : individual ( Perseus); radiation mechanisms : nonthermal;

D O I：

10.1086/520337

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Recently, strong AGN outbursts at the centers of galaxy clusters have been found. Using a simple model, we study particle acceleration around a shock excited by an outburst and estimate nonthermal emission from the accelerated particles. We show that emission from secondary electrons is consistent with the radio observations of the minihalo in the Perseus Cluster, if there was a strong AGN outburst >= 108 yr ago with an energy of similar to 1.8 x 10(62) ergs. The validity of our model depends on the frequency of the large outbursts. We also estimate gamma-ray emission from the accelerated particles and show that it could be detected with GLAST.

引用

页码：L61 / L64

页数：4

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