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Quasi-static evolution of the reconstructed magnetic field of an emerging and eruptive active region

Published online by Cambridge University Press:  27 June 2012

M. Faurobert ,
C. Fang ,
T. Corbard ,
A. Canou  and
T. Amari
A. Canou
Affiliation:
CNRS, Institut d’Astrophysique Spatiale, Bât. 121, 91405 Orsay, France CNRS, Centre de Physique Théorique de l’École Polytechnique, 91128 Palaiseau Cedex, France
T. Amari
Affiliation:
CNRS, Centre de Physique Théorique de l’École Polytechnique, 91128 Palaiseau Cedex, France
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Abstract

We study the evolution of the emerging and eruptive Active Region (AR) 10930 for which the coronal magnetic field is reconstructed as a nonlinear force-free field along with vector magnetograms obtained from Hinode/SOT/SP data. We show that the AR evolves quasi-statically during several days through a sequence of equilibria until the time of the eruption. In addition this sequence emphasizes the formation and expansion of a coronal Twisted Flux Rope (TFR) which is related to other observed coronal structures. On the other hand, the pre-eruptive and post-eruptive magnetic configurations show that the pre-eruptive TFR plays a crucial role during the eruption.

Type
Research Article
Information
European Astronomical Society Publications Series , Volume 55: 4th French-Chinese Meeting on Solar Physics - Understanding Solar Activity: Advances and Challenges , 2012 , pp. 125 - 130
Copyright
© EAS, EDP Sciences 2012

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