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

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

Jul 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002ap%26ss.281..289h&link_type=abstract

Astrophysics and Space Science, v. 281, Issue 1, p. 289-292 (2002).

Astronomy and Astrophysics

Astrophysics

1

Interstellar Medium, Magnetic Field, Cosmic Rays

Scientific paper

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).

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