Bremen 2017 – wissenschaftliches Programm

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EP: Fachverband Extraterrestrische Physik

EP 2: Preissitzung mit Arne Richter Lecture

EP 2.3: Hauptvortrag

Montag, 13. März 2017, 15:25–15:50, GW2 B2880

Aurora on Brown Dwarfs — •Christian Fischer and Joachim Saur — Institute for Geophysics and Meteorology, University of Cologne, Germany

The first detection of aurora outside our solar system through observations at radio and Hα-line emissions of the Brown Dwarf LSR J1835+3259 was recently reported by Hallinan et al. (2015). The observed emissions exhibit a periodicity with the rotation period of LSR J1835+3259 and indicate magnetospheric current systems that create the aurora. The aurora is estimated to be several orders of magnitude stronger than Jupiters aurora. In our presentation we discuss and model possible generator mechanisms that power the aurora, such as an exoplanet or magnetic braking. We quantitatively compare our model results with the observed auroral fluxes.