A semianalytical method for calculating the parameters of the electromagnetic halos around extragalactic gamma-ray sources

被引：1

作者：

Kel'ner, SR

Khangulyan, DV

Aharonian, FA

机构：

[1] State Univ, Moscow Engn Phys Inst, Moscow 115409, Russia

[2] Max Planck Inst Kernphys, D-69117 Heidelberg, Germany

来源：

ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2004年 / 30卷 / 10期

基金：

俄罗斯基础研究基金会;

关键词：

active galactic nuclei; quasars and radio galaxies; electromagnetic halo; blazars; back-ground radiation;

D O I：

10.1134/1.1808052

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The ultrahigh-energy (>20 TeV) gamma rays emitted by active galactic nuclei can be absorbed in intergalactic space through the production of electron-positron pairs during their interaction with extragalactic background photon fields. The electrons and positrons produced by this interaction form an electromagnetic halo. We have studied the halo formation and calculated the halo radiation spectrum. The magnetic field in the halo formation region is assumed to be strong enough for the electron velocities to be isotropized. For such fields, the halo formation process can be described by the method of generations. We calculated the synchrotron and Compton backscattering radiation spectra for the total halo luminosity. We obtained the spatial distribution of the radiation for a point gamma-ray source. (C) 2004 MAIK "Nauka/Interperiodica".

引用

页码：663 / 668

页数：6

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