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Title:
Convective dynamos in spherical wedge geometry
Authors:
Käpylä, P. J.; Korpi, M. J.; Brandenburg, A.; Mitra, D.; Tavakol, R.
Affiliation:
AA(Observatory, University of Helsinki, PO BOX 14, FI-00014 University of Helsinki, Finland; NORDITA, AlbaNova University Center, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden), AB(Observatory, University of Helsinki, PO BOX 14, FI-00014 University of Helsinki, Finland), AC(NORDITA, AlbaNova University Center, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden; Department of Astronomy, AlbaNova University Center, Stockholm University, SE-10691 Stockholm, Sweden), AD(Astronomy Unit, School of Mathematical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom), AE(Astronomy Unit, School of Mathematical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom)
Publication:
Astronomische Nachrichten, Vol.331, Issue 1, p.73 (AN Homepage)
Publication Date:
01/2010
Origin:
AN
Keywords:
Sun: magnetic fields, magnetohydrodynamics (MHD)
DOI:
10.1002/asna.200911252
Bibliographic Code:
2010AN....331...73K

Abstract

Self-consistent convective dynamo simulations in wedge-shaped spherical shells are presented. Differential rotation is generated by the interaction of convection with rotation. Equatorward acceleration and dynamo action are obtained only for sufficiently rapid rotation. The angular velocity tends to be constant along cylinders. Oscillatory large-scale fields are found to migrate in the poleward direction. Comparison with earlier simulations in full spherical shells and Cartesian domains is made.
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