Continuum HAlos in Nearby Galaxies -- an Evla Survey
CHANG-ES is a large proposal to probe the structure and physics of disk-halo outflows in a sample of nearby edge-on galaxies. With unprecedented sensitivity at 1.4 GHz and 6 GHz in all 4 Stokes and over a variety of array configurations, these observations will probe the very nature of galactic dynamos. Because of the sufficiently large and coherent sample, for the first time, we will be able to quantify how magnetic fields and CRs in halos correlate with the properties of the galaxy and the galaxy environment.
Specific science drivers include: The origin of halos and
their physical conditions, the nature, prevalence, and origin of lagging halos, cosmic ray transport
and outflowing wind velocity, the nature of magnetic fields in the context of galactic dynamo models,
and the origin of the far infrared - radio continuum relation.