NonLinear Force-Free Extrapolation of NOAA AR 10930 (2006 Dec. 12)
On the left side – potential extrapolation, on the right side – force-free reconstruction.
Calculations are performed for Hinode/SOT magnetogram on 12 December 2006 20:30 UT.
Distance measured in solar radii. Origin corresponds to the center of the solar disk.
Background image corresponds to the Hinode/XRT image on 12 December 2006 20:30 UT. Colored contours marks polarity of the normal component of magnetic field: blue – negative, red – positive. In case of the force-free reconstruction yellow-colored fraction of the calculated force lines corresponds to sigmoid structure, visible in X-rays. Other calculated lines marked with green color.
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