Plasmoid ejections driven by dynamo action underneath a spherical surface

Details Plasmoid ejections driven by dynamo action underneath a spherical surface Plasmoid ejections driven by dynamo action underneath a spherical surface

2010-11-18

arxiv.org/abs/1011.4299v1

in Advances in Plasma Astrophysics, ed. Proc. IAU, Vol. 6, IAU Symp. S274, A. Bonanno, E. de Gouveia dal Pino, & A. Kosovichev

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

4 pages, 4 figures, proceedings of IAU Symp. 274, Advances in Plasma Astrophysics

Scientific paper

10.1017/S1743921311007186

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.

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