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Turbulent diffusion and galactic magnetism
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2009 (English)In: Proceedings of the International Astronomical Union, ISSN 1743-9213, E-ISSN 1743-9221, Vol. 5, 432-433 p.Article in journal (Other academic) Published
Abstract [en]

Using the test-field method for nearly irrotational turbulence driven by spherical expansion waves it is shown that the turbulent magnetic diffusivity increases with magnetic Reynolds numbers. Its value levels off at several times the rms velocity of the turbulence multiplied by the typical radius of the expansion waves. This result is discussed in the context of the galactic mean-field dynamo.

Place, publisher, year, edition, pages
Cambridge University Press, 2009. Vol. 5, 432-433 p.
Keyword [en]
turbulence, (magnetohydrodynamics:) MHD, galaxies: magnetic fields
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-70505DOI: 10.1017/S1743921310010148OAI: oai:DiVA.org:su-70505DiVA: diva2:481687
Note
Highlights of Astronomy, Vol. 15, ed. E. de Gouveia Dal Pino, CUPAvailable from: 2012-01-22 Created: 2012-01-22 Last updated: 2017-12-08Bibliographically approved

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Brandenburg, AxelDel Sordo, Fabio
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