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EP: Fachverband Extraterrestrische Physik

EP 2: Sun and Heliosphere I

EP 2.1: Hauptvortrag

Dienstag, 31. März 2020, 11:00–11:30, H-HS VIII

Parker Solar Probe and Solar Orbiter — •Gottfried Mann — Leibniz-Institut f\"ur Astrophysik Potsdam (AIP)

ASA's "Parker Solar Probe" (PSP) and ESA's "Solar Orbiter" will be the most important space missions for solar physics in the next decade. Both spacecraft and additional ground based observations of the Sun as e.g. with the radio interferometer LOFAR will give us new insights in the origin of solar activity, its evolution, and its action into the heliosphere. Since August 2018 PSP is flying around the Sun and will approach it down to a distance of 10 solar radii. The launch of Solar Orbiter is presently scheduled to February 5th, 2020. It will approach the Sun in 2022. The perihel will be about 0.28 AU allowing the co-rotation with the Sun for approx. 10 days. That gives us the opportunity to study the origin and evolution of active regions and their influence into the heliosphere.

Thanks of the support by the German Space Agency DLR German solar physicists are substantially involved in the Solar Orbiter mission and partly into PSP, as e.g. in the X-ray telescope STIX.

The Sun is an active star. Eruptions as flares and coronal mass ejections (CMEs) are accompanied with an enhanced emission of electromagnetic radiation from the radio up to the gamma-ray range indicating the generation of energetic electron during flares. These electrons carry a substantial part of the flare released energy. Hence, the generation of energetic electrons plays an important role in the understanding of the flare process. This is the reason why we focus on this research topic at AIP.