Gamma-ray astronomy and cosmic ray origin problem

被引：23

作者：

Berezhko, EG ^{[1
]}

机构：

[1] Yu G Shafer Inst Cosmophys Res & Aeronomy, Yakutsk 678980, Russia

来源：

YOUNG NEUTRON STARS AND SUPERNOVA REMNANTS | 2005年 / 35卷 / 06期

关键词：

galactic cosmic rays; supernova remnants; shock acceleration; nonthermal emission : radioemission; X-rays; gamma-rays;

D O I：

10.1016/j.asr.2004.12.016

中图分类号：

V [航空、航天];

学科分类号：

08 ; 0825 ;

摘要：

We analyse the results of the nonlinear kinetic theory of cosmic ray (CR) acceleration in supernova remnants (SNRs) in order to describe their relevant properties: the remnant dynamics and the characteristics of nonthermal emission produced by CRs. It is shown that the theory fits the existing data in a satisfactory way and that the magnetic field in SNRs is significantly amplified due to efficient acceleration of the nuclear CR component. From the fact that magnetic field amplification occurs in all the young SNRs for which relevant data exist, and given the strong theoretical connection between magnetic field amplification and efficiently accelerating the nuclear CRs, we tentatively conclude that the Galactic SNRs are the source population of the Galactic CRs. Due to high interior magnetic fields in young SNRs the pi(0)-decay gamma-rays generated by the nuclear CR component as a rule dominate over gamma-rays generated by the electron CR component, and the calculated gamma-ray flux fits existing data. (c) 2004 COSPAR. Published by Elsevier Ltd. All rights reserved.

引用

页码：1031 / 1040

页数：10

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