Solar pores
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Pores, bright points and granulation in AR 12708 (2/2)
GREGOR
Active region 12708 was observed on 9 May 2018 with the High-Resolution Fast Imager (HiFI) at the German 1.5-meter GREGOR telescope (Observatorio del Teide, Tenerife, Spain). A wideband blue-continuum 450.5 nm (FWHM 1.2 nm) interference filter was used. The image was speckle reconstructed from a burst of 100 frames taken within 20 seconds. In order to freeze the seeing, each image was exposed for 7 milliseconds. During the measurements, the GREGOR adaptive optics system was locked on the pore to partially correct for atmospheric seeing effects.
The image shows a central dark pore surrounded by smaller tiny pores (dark concentrations). The overall surface is covered by solar granulation. In between the granules, in the intergranular lanes, sometimes so-called bright points appear.
Image credit: Christoph Kuckein (AIP), Horst Balthasar (AIP), Sergio J. González Manrique (AISAS)
Publication: Kuckein, 2019, A&A, in press