| Issue |
EAS Publications Series
Volume 55, 2012
4th French-Chinese Meeting on Solar Physics - Understanding Solar Activity: Advances and Challenges
|
|
|---|---|---|
| Page(s) | 125 - 130 | |
| Section | Active Regions | |
| DOI | https://doi.org/10.1051/eas/1255017 | |
| Published online | 27 June 2012 | |
M. Faurobert, C. Fang and T. Corbard (eds)
EAS Publications Series, 55 (2012) 125-130
Quasi-static evolution of the reconstructed magnetic field of an emerging and eruptive active region
1
CNRS, Institut d’Astrophysique Spatiale,
Bât. 121, 91405
Orsay,
France
2
CNRS, Centre de Physique Théorique de l’École
Polytechnique, 91128
Palaiseau Cedex,
France
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.
© EAS, EDP Sciences 2012