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Volume 358 - 36th International Cosmic Ray Conference (ICRC2019) - CRI - Cosmic Ray Indirect
New constraints on galactic CRE transport from radio continuum observations
R.J. Dettmar,* V. Heesen, A. Miskolczi, Y. Stein
*corresponding author
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Pre-published on: 2019 July 22
Published on:
Abstract
The importance of cosmic rays and magnetic fields for the physics of the
interstellar medium and the evolution of galaxies is demonstrated by a number
of recent numerical simulations. We present 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. The observations also allow to derive the magentic field structure in galactic halos. In addition, it is demonstrated how recent low frequency observations of edge-on galaxies with LOFAR help to further constrain the problem.
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