Fig. 4From: The transition region above sunspotsA 1400 Å image of a sunspot taken by IRIS on Nov 19, 2014. The field of view of the image has a size of about 160″ × 165″. The small white box indicates a region where several penumbral bright dots (Tian et al. 2014b) are observed. The large white box shows a zoomed-in view of this regionBack to article page