Granulation at solar disk center

GREGOR

The quiet Sun at the solar disk center was observed on 17 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 w ithin 20 seconds. In order to freeze the seeing, each image was exposed for 9 milliseconds.

The image shows a typical granulation pattern on the solar surface. The granulation pattern is made out of individual granules which slowly evolve on time scales of minutes.

Image credit: Christoph Kuckein (AIP), Horst Balthasar (AIP), Sergio J. Gonzalez Manrique (AISAS)