Reconciliating the Vertical and Horizontal Gradients of the Sunspot Magnetic Field
Figure 1
δ-spot of NOAA 10808 observed with THEMIS on 13 September 2005 in Fe I 6302.5 and 6301.5 Å. (a): Map of . (b): Map of , in the solar reference frame. The maps are not corrected from anamorphosis. The pixel size in is 0.8 arcsec, whereas the pixel size in is 0.4 arcsec. NL: magnetic field neutral line. The difference in magnetic field gradient by a factor of 9 between the two maps is clearly visible.
