Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2011-02-07
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
6 pages, 4 figures, to appear in Proceedings of IAU Symp. 274, Advances in Plasma Astrophysics, ed. A. Bonanno, E. de Gouveia
Scientific paper
We present recent developments of global galactic-scale numerical models of the Cosmic Ray (CR) driven dynamo, which was originally proposed by Parker (1992). We conduct a series of direct CR+MHD numerical simulations of the dynamics of the interstellar medium (ISM), composed of gas, magnetic fields and CR components. We take into account CRs accelerated in randomly distributed supernova (SN) remnants, and assume that SNe deposit small-scale, randomly oriented, dipolar magnetic fields into the ISM. The amplification timescale of the large-scale magnetic field resulting from the CR-driven dynamo is comparable to the galactic rotation period. The process efficiently converts small-scale magnetic fields of SN-remnants into galactic-scale magnetic fields. The resulting magnetic field structure resembles the X-shaped magnetic fields observed in edge-on galaxies.
Hanasz Michał
Kotarba Hanna
Kowalik Kacper
Wóltański Dominik
No associations
LandOfFree
Cosmic-ray driven dynamo in galaxies does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cosmic-ray driven dynamo in galaxies, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmic-ray driven dynamo in galaxies will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-681116