UV and visible light radiances as a function of solar radii. Top panel: mean UV Ly-α intensity within the area of the observed structures selected for each frame as described in the text (Sect. 4.2). Bottom panel: peak of brightness in the base difference of polarized signal (indicated by stars) and total brightness (indicated by diamonds) at the position corresponding to the highest luminosity peak within the structure area in the respective UV frames (see Sect. 4.2). Both panels: dashed lines are a quadratic fit to the shown mean radiance as function of de-projected radial distance.