Building the Fast Galactic Dynamo

Details Building the Fast Galactic Dynamo Building the Fast Galactic Dynamo

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004ap%26ss.289..303h&link_type=abstract

Astrophysics and Space Science, v. 289, Issue 3, p. 303-306 (2004).

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 randomly distributed 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 and Coriolis force. This process provides a possibility of very efficient magnetic field amplification within the general frame of so called fast galactic dynamo proposed by Parker (1992).

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