SH038-01
Observation of Smallest Ever Detected Brightening Events with the Solar Orbiter EUI HRI-EUV Imager

Monday, 14 December 2020: 05:30
Virtual
Susanna Parenti1, David Berghmans2, Eric Buchlin3, Luca Teriaca4, F Auchere3, Louise Harra5, David Long6, Pierre Leon Rochus7, Udo Schühle4, Regina Aznar Cuadrado4, Samuel Gissot8, Emil Kraaikamp8, Philip Smith9, Koen Stegen8 and Cis Verbeeck8, (1)CEA Commissariat à l'Energie Atomique Saclay, Gif-Sur-Yvette Cedex, France, (2)Solar-Terrestrial Centre of Excellence, Leuven, Belgium, (3)Université Paris-Saclay, CNRS, Institut d'Astrophysique Spatiale, Orsay, France, (4)Max Planck Institute for Solar System Research, Göttingen, Germany, (5)PMOD/WRC and ETH-Zürich, Davos, Switzerland, (6)University College London, London, United Kingdom, (7)Centre Spatial de Liege, Liege, Belgium, (8)Royal Observatory of Belgium, Brussels, Belgium, (9)UCL - Mullard Space Science Laboratory, Holmbury St. Mary, Dorking, Surrey, United Kingdom
Recorded Presentation
Abstract:
The Extreme Ultraviolet Imager (EUI) suite on board Solar Orbiter acquired its first images in May 2020. The passband of the 17.4 nm High Resolution Imager (HRI-EUV) is dominated by emission lines of Fe IX and Fe X, that is the 1 million degree solar corona. The solar atmosphere at this temperature is dynamic at all scales, down to the highest spatial resolution available from instruments priori to Solar Orbiter. During the Commissioning phase, HRI-EUV acquired several high temporal resolution (a few seconds) sequences at quiet Sun regions at disk center. The instrument revealed a multitude of brightenings at the smallest-ever detectable spatial scales which, at that time, was about 400 km (two pixels). These events appear to be present everywhere all the time. We present the first results of the analysis of these sequences with the aim of understanding the role of these small scale events in the heating of the solar corona.
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