Comprehensive Mapping and Statistical Analysis of Energetic Ion Distributions in Jupiter’s Magnetosphere Using Juno/JEDI Data

This study performs a comprehensive investigation of Jupiter’s multispecies plasma that fill its extensive and dynamic magnetosphere. In particular, we analyze energetic ion data from Juno’s Jupiter Energetic particle Detector Instrument (JEDI). Specifically, we use measurements from the JEDI-090 and JEDI-270 identical instruments, which provide measurements for the energy, angular, and compositional distributions of hydrogen (∼50 keV to ∼1 MeV), oxygen (∼170 keV to ∼2 MeV) and sulfur (∼170 keV to ∼4MeV) ions. In this survey, we present comprehensive ion maps derived from the entire Juno prime mission (orbits 1 to 34) and spanning all available energy channels, when the spacecraft explored the dawn to pre-midnight sector of Jupiter's magnetosphere. These maps reveal the spatial and energetic distributions of hydrogen, oxygen, and sulfur ions, providing insights into the global magnetodisk structure, and ion distributions in both equatorial and off-equatorial regions. As part of our ongoing work, we also calculate the H/O and H/S ion composition ratios and assess the spectral indices to characterize the energization processes of these ion populations. With this work, we aspire to highlight Juno’s transformative contribution to advancing our understanding of Jupiter’s magnetosphere and its broader implications for comparative planetary studies.