München 2019 – scientific programme

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EP: Fachverband Extraterrestrische Physik

EP 8: Planets and Exoplanets

EP 8.5: Talk

Thursday, March 21, 2019, 15:45–16:00, HS 9

Time-variable Star-Planet Interaction in the TRAPPIST-1 system — •Christian Fischer and Joachim Saur — Institut für Geophysik und Meteorologie, Universität zu Köln, Köln, Deutschland

Star-planet interaction (SPI) describes the electromagnetic coupling of an exoplanet to its host star. Due to the bright intrinsic emissions of stars SPI is difficult to observe. Accordingly there is no entirely convincing observational evidence for SPI so far. Therefore we present different mechanisms that cause time-variability in SPI and allow to identify related signals as of planetary origin. We chose the TRAPPIST-1 system as an example to apply our findings and show that there are hints of SPI in existing observations of the system.