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Dynamical quenching with non-local alpha and downward pumping
Stockholm University, Nordic Institute for Theoretical Physics (Nordita). Stockholm University, Faculty of Science, Department of Astronomy.
2015 (English)In: Astronomical Notes - Astronomische Nachrichten, ISSN 0004-6337, E-ISSN 1521-3994, Vol. 336, no 1, 91-96 p.Article in journal (Refereed) Published
Abstract [en]

In light of new results, the one-dimensional mean-field dynamo model of Brandenburg & Kapyla (2007) with dynamical quenching and a nonlocal Babcock-Leighton a effect is re-examined for the solar dynamo. We extend the one-dimensional model to include the effects of turbulent downward pumping (Kitchatinov & Olemskoy 2011), and to combine dynamical quenching with shear. We use both the conventional dynamical quenching model of Kleeorin & Ruzmaikin (1982) and the alternate one of Hubbard & Brandenburg (2011), and confirm that with varying levels of non-locality in the a effect, and possibly shear as well, the saturation field strength can be independent of the magnetic Reynolds number.

Place, publisher, year, edition, pages
2015. Vol. 336, no 1, 91-96 p.
Keyword [en]
magnetic fields, magnetohydrodynamics (MHD)
National Category
Astronomy, Astrophysics and Cosmology
URN: urn:nbn:se:su:diva-116006DOI: 10.1002/asna.201412141ISI: 000350100400009OAI: diva2:801860


Available from: 2015-04-10 Created: 2015-04-08 Last updated: 2016-07-01Bibliographically approved

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Brandenburg, Axel
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Nordic Institute for Theoretical Physics (Nordita)Department of Astronomy
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Astronomical Notes - Astronomische Nachrichten
Astronomy, Astrophysics and Cosmology

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ReferencesLink to record
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