Other
Scientific paper
Sep 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..397..110i&link_type=abstract
First Results From Hinode ASP Conference Series, Vol. 397, Proceedings of the conference held 20-24 August, 2007, at Trinity Col
Other
8
Scientific paper
Active region NOAA 10930 produced the first X-class flare observed by the Hinode satellite. Fortunately, the data covers the time span before and after the X-class flare arising on December 13, 2006 in this active region. During this event, the Hinode satellite clearly observed the typical features of a flare: two ribbon and post flare loop structures seen by SOT, sigmoidal structure before the onset, and subsequent cusp loop structure seen by XRT. We analyzed the three-dimensional magnetic structure of the region before and after the flare on Dec.13, 2006 using the Non-Linear Force-Free (NLFF) extrapolation method based on extended magnetofrictional method.
As a result of the NLFF extrapolation, we found that, before the flare onset, strong sheared structures were formed on the neutral line. Furthermore, we revealed that a sigmoidal structure was not formed of a single loop, but was composed of strong multiple sheared field. On other the hand, after the flare, elongated magnetic flux is partially formed and a part of magnetic shear was released. The result indicates that the part of NLFF relaxes toward the potential like field in this event.
Inoue Susumu
Kusano Kanya
Magara Tetsuya
Masuda Seiji
Miyoshi Takahiro
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