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Plasmoid ejections driven by dynamo action underneath a spherical surface
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).
Stockholm University, Nordic Institute for Theoretical Physics (Nordita).
2010 (English)In: Proceedings of the International Astronomical Union, ISSN 1743-9213, E-ISSN 1743-9221, Vol. 6, no Symposium S274, 306-309 p.Article in journal (Refereed) Published
Abstract [en]

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.

Place, publisher, year, edition, pages
2010. Vol. 6, no Symposium S274, 306-309 p.
Keyword [en]
MHD, Sun: magnetic fields, Sun: coronal mass ejections (CMEs), turbulence
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-70504DOI: 10.1017/S1743921311007186OAI: oai:DiVA.org:su-70504DiVA: diva2:481688
Note
Advances in Plasma Astrophysics, ed. Proc. IAU, Vol. 6, IAU Symp. S274, A. Bonanno, E. de Gouveia dal Pino, & A. KosovichevAvailable from: 2012-01-22 Created: 2012-01-22 Last updated: 2017-12-08Bibliographically approved

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Warnecke, JörnBrandenburg, Axel
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