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A flux‐transport dynamo with a multi‐cell meridional circulation
Author(s) -
Bonanno A.,
Elstner D.,
Belvedere G.,
Rüdiger G.
Publication year - 2005
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200410372
Subject(s) - dynamo , meridional flow , physics , zonal and meridional , solar dynamo , flux (metallurgy) , helicity , circulation (fluid dynamics) , turbulence , dynamo theory , mechanics , atmospheric sciences , magnetic field , chemistry , quantum mechanics , organic chemistry
We discuss the effect of a non‐trivial meridional circulation pattern on a flux‐transport type of solar dynamo. The critical value of the turbulent helicity and the periods are calculated as a function of the meridional flow strength. We found that the dynamo mechanism is mainly determined by the global topology of the meridional flow. In particular the equatorwards migration in the butterfly diagram can be easily obtained by the combined action of two cells of meridional circulation. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)