Fig. 2
Continuum image and velocities of the Fe i 5198.71 Å and Fe ii 5197.58 Å lines. The velocities are obtained after the λ-meter technique at the position at the wings of each line nearest to the continuum. We note the similarity in the velocity field. The circles in the left panel indicate the rings in the penumbra where we performed the fit to the velocities.
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