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EP: Fachverband Extraterrestrische Physik

EP 13: Exoplanets and Astrobiology

EP 13.1: Hauptvortrag

Freitag, 3. April 2020, 10:00–10:30, H-HS VIII

Habitability of extrasolar planets and the impact of interior-atmosphere interactions under different stellar evolutions — •Mareike Godolt — Zentrum für Astronomie und Astrophysik, Technische Universität Berlin, Germany

Habitability of extrasolar planets is often defined by the potential availability of liquid water on the planetary surface. This depends on various factor, such as the water inventory of the planet as well as the atmospheric pressure and temperature at the planetary surface, which are the result of various processes and factors. Relevant factors include the size and mass of the planet via the gravitational acceleration, the atmospheric mass, as well as the atmospheric composition, which is a result of planetary formation and subsequent interactions with the interior and space as well as atmospheric chemistry. The atmospheric chemical composition and mass determine the impact of the stellar irradiation via radiative but also convective processes which dominate the heating and the cooling processes of the planet. In this talk I will review current knowledge of central factors for habitability and highlight the relevance of the common evolution of the planetary interior with the atmosphere and the host star. Furthermore, I will present studies evaluating the detectability of atmospheres of small, potentially habitable planets with near future instrumentation.