The dynamical coupling of cosmic rays and magnetic field in galactic disks

被引：2

作者：

Hanasz, M ^{[1
]}

Lesch, H

机构：

[1] Nicholas Copernicus Univ, Ctr Astron, PL-87148 Piwnice Torun, Poland

[2] Univ Observ, D-81679 Munich, Germany

来源：

ASTROPHYSICS AND SPACE SCIENCE | 2002年 / 281卷 / 1-2期

关键词：

interstellar medium; magnetic field; cosmic rays;

D O I：

10.1023/A:1019576612600

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this paper we demonstrate the importance of cosmic rays for the dynamics of the interstellar medium. We present the first 3D-MHD numerical simulations of the Parker instability triggered by cosmic rays accelerated in supernova remnants. We show that in the presence of galactic rotation a net radial magnetic field is produced as a result of the cosmic ray injection. This process provides a very efficient magnetic field amplification within the general frame of so called fast galactic dynamo proposed by Parker (1992).

引用

页码：289 / 292

页数：4

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