Interplay of CR-driven galactic wind, magnetic field, and galactic dynamo in spiral galaxies

Details Interplay of CR-driven galactic wind, magnetic field, and galactic dynamo in spiral galaxies Interplay of CR-driven galactic wind, magnetic field, and galactic dynamo in spiral galaxies

2009-01-07

arxiv.org/abs/0901.0845v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

2 pages. To be published in "Cosmic Magnetic Fields: From Planets, to Stars and Galaxies", K.G. Strassmeier, A.G. Kosovichev &

Scientific paper

10.1017/S1743921309031263

From our radio observations of the magnetic field strength and large-scale pattern of spiral galaxies of different Hubble types and star formation rates (SFR) we conclude that - though a high SFR in the disk increases the total magnetic field strength in the disk and the halo - the SFR does not change the global field configuration nor influence the global scale heights of the radio emission. The similar scale heights indicate that the total magnetic field regulates the galactic wind velocities. The galactic wind itself may be essential for an effective dynamo action.

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