Incorporating Cosmic Rays In Local And Global Models Of Disk-Halo Interaction
Abstract
We present new developments on the cosmic-ray driven, galactic dynamo, modeled by means of direct, resistive CR-MHD simulations, performed with ZEUS and PIERNIK codes. The dynamo action, leading to the amplification of large-scale galactic magnetic-fields on galactic rotation timescales, appears as a result of galactic differential rotation, buoyancy of the cosmic-ray component and resistive dissipation of small-scale turbulent magnetic-fields. Our new results include demonstration of the global-galactic dynamo action driven by cosmic-rays supplied in supernova remnants. An essential outcome of the new series of global galactic dynamo models is the equipartition of the gas turbulent energy with magnetic-field energy and cosmic-ray energy, in saturated states of the dynamo on large galactic scales.
- Publication:
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EAS Publications Series
- Pub Date:
- September 2012
- DOI:
- Bibcode:
- 2012EAS....56..347H