Turbulent Heating in Jupiter's Middle Magnetosphere From Juno Data

作者：M. Franciscovich, C. Ng, P. Delamere, P. Damiano, C. Spitler, A. Smith, V. A. Palmer · 发表于：Journal of Geophysical Research - Space Physics · 年份：2026 · DOI：10.1029/2026ja035351

The ion temperature in Jupiter's middle magnetosphere has been known to stay constant (or even increase) as a function of radial distance from the planet. This suggests that there is a non‐adiabatic heating process occurring in this region. Efforts have been made to explain this heating with different turbulent heating models utilizing data from previous science missions to Jupiter (Ng et al., 2018, https://doi.org/10.1029/2018JA025345 ; 2022, https://doi.org/10.1029/2021GL096662 ; Saur, 2004, https://doi.org/10.1086/382588 ). Using the turbulent heating rate density calculated from the Juno spacecraft magnetometer and particle data based on a forward fitting model utilizing a kappa distribution (Wang, Bagenal, Wilson, Nerney, et al., 2024, https://doi.org/10.1029/2023JA032218 ; Wang et al., 2024b, https://doi.org/10.1029/2024JA033454 ), the thermal equilibrium ion temperature in Jupiter's middle magnetosphere is estimated using an advection temperature model. We find that the model is not sufficient to account for the – K ( keV) temperatures seen in the forward fits particle data, which is about an order of magnitude higher than previously reported in particle data surveys (Bagenal & Delamere, 2011, https://doi.org/10.1029/2010JA016294 ).