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Cosmic-ray driven dynamo in galactic disks

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dc.contributor.author Hanasz, Michał
dc.contributor.author Otmianowska-Mazur, Katarzyna
dc.contributor.author Lesch, Harald
dc.contributor.author Kowal, Grzegorz
dc.contributor.author Soida, Marian
dc.contributor.author Wóltański, Dominik
dc.contributor.author Kowalik, Kacper
dc.contributor.author Pawłaszek, Rafał
dc.contributor.author Kulesza-Żydzik, Barbara
dc.date.accessioned 2012-12-19T09:06:12Z
dc.date.available 2012-12-19T09:06:12Z
dc.date.issued 2008-12-31
dc.identifier.other doi:10.1017/S1743921309031147
dc.identifier.uri http://repozytorium.umk.pl/handle/item/236
dc.description.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.
dc.language.iso eng
dc.relation.uri http://arxiv.org/abs/0901.0111
dc.rights info:eu-repo/semantics/openAccess
dc.subject Astrophysics - Galaxy Astrophysics
dc.subject Astrophysics - High Energy Astrophysical Phenomena
dc.title Cosmic-ray driven dynamo in galactic disks
dc.type info:eu-repo/semantics/article


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