Contributed Talk - Splinter ISM

Wednesday, 23 September 2020, 15:13   (virtual room F)

Observational Constraints on the CRE Transport in Galactic Halos

Ralf-Jürgen Dettmar, Volker Hessen, Arpad Miskolczi, Yelena Stein and the CHANG-ES and MKSP NG Teams
Ruhr-Universität Bochum, Universität Hamburg, Observatoire de Strasbourg

Recent numerical simulations demonstrate the importance of cosmic rays and magnetic fields for the physics of the interstellar medium and thus the evolution of galaxies. In this presentation we report results from new observations of the cosmic ray electron transport as well as the magnetic field strength and structure in galactic halos from radio-continuum polarization studies of edge-on disk galaxies obtained by the CHANG-ES (Continuum Halos in Nearby Galaxies - an EVLA Survey) project. The observations are discussed in the context of transport models for Cosmic Ray Eelctrons (CREs) from the star-forming disks into the halo. In addition, it is demonstrated how recent low frequency observations of edge-on galaxies with LOFAR help to further constrain the problem. Finally we will compare our results with predictions from state of the art simulations.