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Three-dimensional model of ionospheric outflow at Ganymede

Presentation #314.02D in the session Icy Satellites, Fields and Particles (Poster + Lightning Talk)

Published onOct 23, 2023
Three-dimensional model of ionospheric outflow at Ganymede

We employ a hybrid plasma model to study the outflow of ionospheric ions at Jupiter’s largest moon, Ganymede. We investigate how ionospheric models of increasing complexity populate the moon’s tail region with pick-up ions and how outflowing ions may affect plasma and magnetic field signatures in the moon’s near-space environment. Our study consists of five different model setups. Starting from a model configuration with no atmosphere or ionosphere, we establish “baseline” conditions for the magnetic and plasma signatures in Ganymede’s near-space environment. Each subsequent setup adds one new atmospheric or ionospheric model element to the previous setup, allowing us to analyze the effect each species has on the magnetic and plasma signatures near the moon. By including O2, H2, and H2O ions in a multi-species ionosphere in the final model setup, we ensure that the dynamics of ionospheric species across the entire range of gryoradii occurring at Ganymede are included in our analysis. As a case study, we model the magnetospheric conditions present at Ganymede during the Juno PJ34 flyby on June 7, 2021, and compare our model output with Juno magnetic and plasma observations from the flyby.

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