Fig. 8.
3D magnetic topology of the sunspot penumbral filaments intruding into the light bridge revealed by NLFFF extrapolation at 01:00 UT on 2019 May 13. Panels a and b: intruding filaments and sunspot umbral fields from a side view and a top view, respectively. Panel c: displays logarithmic Q distribution in the vertical plane based on the black cut denoted in (panel b), which distinctly depicts the high-Q region above the light bridge (LBQ).
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