SMuK 2021 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 5: Exoplanets and Astrobiology I

EP 5.5: Vortrag

Mittwoch, 1. September 2021, 17:45–18:00, H9

INCREASE - An updated model suite to study the INflucence of Cosmic Rays on Exoplanetary AtmoSpherEs — •Konstantin Herbst¹, John Lee Grenfell², Miriam Sinnhuber³, and Fabian Wunderlich² — ¹IEAP, Christian-Albrechts-Universität zu Kiel, 24108 Kiel, Germany — ²PF, Deutsches Zentrum fuer Luft- und Raumfahrt (DLR), 12489 Berlin, Germany — ³Institut fuer Meteorologie und Klimaforschung, Karlsruher Institut fuer Technologie (KIT), 76344 Eggenstein-Leopoldshafen, Germany

The first opportunity to detect indications for life outside of the Solar System may be provided already within this decade. However, the harsh stellar radiation and particle environment of planets in the habitable zone of their host stars could lead to photochemical loss of atmospheric biosignatures. A self-consistent model suite of combined state-of-the-art tools has been developed by Herbst et al. (2019) to study the impact of the radiation and particle environment on atmospheric particle interactions, composition, and climate interactions. Here we present our updated model suite to study a wide range of possible exoplanetary atmospheres and stellar environments tackling the following questions: (1) What processes determine whether (rocky) worlds around cooler stars can retain their atmospheres? (2) How do different atmospheres evolve for cool star systems?, and (3) How do results from our studies compare with observations? Thereby, we will focus on the impact of stellar activity on planetary climate, atmospheric escape, density and composition, surface radiation dose, and the impact on potential observables.