[P-PS06] 惑星科学

[PPS06-P11] Long-term Enhancing of Jupiter’s Electrostatic Waves as Diagnostic of Io’s Mass Loading Activity

*Minyi Long¹、Bibin Ni、Elias Roussos、Danny Summers、Michel Blanc、Zhiyong Xiao、Xing Cao、Zhonghua Yao、Binzheng Zhang、 Shengyi Ye、Qingyun Deng、Enhao Feng、Peng Lu、Shaobei Wang (1.Department of Space Science and Technology, School of Earth and Space Science and Technology, Wuhan University, Wuhan, China.)

キーワード：Jupiter’s magnetosphere, Io’s mass loading, hot electron fluxes, electrostatic electron cyclotron harmonic waves, Jupiter-Io system

Jupiter's space environment is highly dynamic, shaped by interactions between the solar wind, Jupiter’s strong magnetic field, and its moons. As a primary plasma source in the Jovian system, Io supplies with a substantial amount of plasmas to Jupiter’s magnetosphere through the process of mass loading. However, direct observations linking Io’s mass loading activity with Jupiter's magnetospheric dynamics remain elusive. By analyzing magnetospheric plasma wave and hot electron data from the Juno satellite, we find high correlations between the annually averaged values of electrostatic electron cyclotron harmonic (ECH) wave amplitudes and the integral fluxes of hot electrons in the Jovian magnetosphere. Global simulations indicate that an increasing trend in Io's mass loading activity can plausibly account for the observed overall increase in hot electron fluxes, which consequently enhances ECH wave amplitudes at Jupiter. This relationship suggests that in situ measurements of Jupiter’s electrostatic waves provide a remote diagnostic tool for understanding the interior dynamics of the Jupiter-Io system, with important implications for other planetary systems including exoplanets.