EGU2020-11791, updated on 12 Jun 2020
EGU General Assembly 2020
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Wave-particle interaction in the Io flux tube

Sascha Janser1, Joachim Saur1, Jamey Szalay2, and George Clark3
Sascha Janser et al.
  • 1University of Cologne, Institute for Geophysics and Meteorology, Department of Geosciences, Cologne, Germany (
  • 2Department of Astrophysical Sciences, Princeton University, Princeton, New Jersey, USA
  • 3Johns Hopkins University Applied Physics Lab, Laurel, Maryland, USA

Observations by the JUNO spacecraft revealed energetic, bidirectional particle populations with broadband energy distributions in the high-latitude region of Jupiter. These measurements indicate that an acceleration mechanism of stochastic nature plays a dominant role for the generation of the intense main auroral oval. In our current work, we investigate the heating of an energetic upward proton population recently observed by JUNO in the Io flux tube wake near Jupiter. We try to infer on the relevant physical acceleration process by considering a resonant as well as a non-resonant wave-particle interaction mechanism, both based on Alfven waves. We focus on necessary temporal scales to drive these mechanisms efficiently and also on the released wave energy by means of the transported Poynting flux along the flux tube.

How to cite: Janser, S., Saur, J., Szalay, J., and Clark, G.: Wave-particle interaction in the Io flux tube, EGU General Assembly 2020, Online, 4–8 May 2020, EGU2020-11791,, 2020