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

摘要

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