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Fig. 13


Average flow properties of opposite polarity patches in the penumbra, obtained by making azimuthal fits of the inferred LOS velocities at τc = 0.95 within the red patches (circles), and for all other (i.e., excluding the opposite polarity field) intra-spine pixels (plus symbols) shown in Fig. 11. The left column shows the results obtained with inversions using 2 nodes for the LOS velocity, the right column with 3 nodes. The penumbra is divided into 6 radial zones, where zone 1 corresponds to the innermost penumbra. On the average, the opposite polarity patches show genuine downflows throughout the penumbra, corresponding to a downflow of 0.6–1.3 km s-1 relative to the average of all intra-spine pixels, and an increased inclination by 10–20°, compared to the intra-spines. The radial outflow velocity of the opposite polarity field is similar to that of other intra-spine pixels.

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