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Plasmoid ejections driven by dynamo action underneath a spherical surface

Published online by Cambridge University Press:  08 June 2011

Jörn Warnecke ,
Axel Brandenburg  and
Dhrubaditya Mitra
Jörn Warnecke
Affiliation:
Nordita, AlbaNova University Center, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden email: joern@nordita.org Department of Astronomy, AlbaNova University Center, Stockholm University, SE 10691 Stockholm, Sweden
Axel Brandenburg
Affiliation:
Nordita, AlbaNova University Center, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden email: joern@nordita.org Department of Astronomy, AlbaNova University Center, Stockholm University, SE 10691 Stockholm, Sweden
Dhrubaditya Mitra
Affiliation:
Nordita, AlbaNova University Center, Roslagstullsbacken 23, SE-10691 Stockholm, Sweden email: joern@nordita.org
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Abstract

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We present a unified three-dimensional model of the convection zone and upper atmosphere of the Sun in spherical geometry. In this model, magnetic fields, generated by a helically forced dynamo in the convection zone, emerge without the assistance of magnetic buoyancy. We use an isothermal equation of state with gravity and density stratification. Recurrent plasmoid ejections, which rise through the outer atmosphere, is observed. In addition, the current helicity of the small–scale field is transported outwards and form large structures like magnetic clouds.

Keywords

MHDSun: magnetic fieldsSun: coronal mass ejections (CMEs)turbulence
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S274: Advances in Plasma Astrophysics , September 2010 , pp. 306 - 309
Copyright
Copyright © International Astronomical Union 2011

References

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