Speaker
Description
Most recent numerical models of the multiphase interstellar medium (ISM) in disk galaxies have demonstrated the importance of cosmic rays (CRs) and magnetic fields for the physics of the ISM including the launch of galactic winds. These components of the ISM contribute significantly to the total pressure and thus influence the large scale distribution of the ISM and its evolution. Observational evidence from radio-continuum polarization studies of edge-on galaxies on magnetic field strength and structure will be presented and the propagation of cosmic ray electrons (CREs) in galactic halos will be discussed. Observations from the CHANG- ES (Continuum HAlos in Nearby Galaxies - an EVLA Survey; PI J. Irwin) project benefit from complementary LOFAR observations. The lowest frequencies provide additional constraints on the extent of magnetic fields in galactic halos and on the synchrotron losses of the CR electrons.
