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Satellite-Magnetosphere Interaction Effects at Uranus and Neptune

Presentation #324.07 in the session Giant Planet Magnetospheres, Ionospheres and Aurorae (Poster + Lightning Talk)

Published onOct 23, 2023
Satellite-Magnetosphere Interaction Effects at Uranus and Neptune

Satellite-magnetosphere interaction plays an important role in the magnetospheres of the outer planets. The Io-interaction of the Jovian magnetosphere is an outstanding example, to be followed by Europa and Ganymede that has its own intrinsic magnetic field. In the Saturnian system, we have the very interesting cases of Titan interaction which is Venus-like and the Enceladus interaction which is Io-like. The radiolysis effects of the inner icy moons, Mimas and Tethys, have drawn a lot of attention because of its Pac-man like pattern of surface temperature distribution. The distinct leading-side/trailing-side asymmetries in the surface ice layers of Mimas and Tethys are generated by the bombardment process of the energetic electrons trapped in the (nearly) symmetric dipole field of Saturn. It is therefore interesting to examine whether similar radiolysis might still be present in the icy moons of Uranus and Neptune whose magnetic fields are highly asymmetric. In this study we will use the simplified OTD models of Uranus and Neptune, respectively, to compute the trajectories of ions and electrons with a view to investigate the corresponding surface distributions of particle impact fluxes to the satellite surfaces plus the resultant micro-absorption signatures of the trapped radiation.

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