Home » Hao et al. 2024

Acceleration of Energetic Electrons in Jovian Middle Magnetosphere by Whistler-Mode Waves

Hao Y. -., Y. Y. Shprits, J. D. Menietti, T. Averkamp, D. D. Wang, P. Kollmann, G. B. Hospodarsky, A. Drozdov, A. Saikin, E. Roussos, N. Krupp, R. B. Horne, E. E. Woodfield, S. J. Bolton, (2024), Acceleration of Energetic Electrons in Jovian Middle Magnetosphere by Whistler-Mode Waves, J. Geophys. Res. [Space Physics], 129, e2024JA032735, doi:10.1029/2024JA032735, e2024JA032735 2024JA032735

Abstract

Abstract An abundant multi-MeV electron population beyond the orbit of Io is required to explain the intense inner radiation belt (electrons >50 ${ >} 50$ MeV) at Jupiter and its synchrotron radiation. In order to better understand the synergistic effect of radial transport and local wave-particle interactions driven by whistler-mode waves on the formation of Jupiter's radiation belt, we perform 3-D Fokker-Planck simulations for Jovian energetic electrons with the Versatile Electron Radiation Belt code. An empirical model of Jovian whistler-mode waves updated with measurements from the Juno extended mission is used to quantify the local acceleration and pitch angle scattering. Resonant cyclotron acceleration by whistler-mode waves leads to significant enhancement in the intensity of electrons above 1 MeV in the middle magnetosphere. Radial diffusion is capable of transporting MeV electrons accelerated by outer-belt whistler-mode waves into the M<10 $M< 10$ region, where they are further accelerated adiabatically to energies of about 10 MeV.

Authors (sorted by name)

Averkamp Bolton Drozdov Hao Horne Hospodarsky Kollmann Krupp Menietti Roussos Saikin Shprits Wang Woodfield

Journal / Conference

Journal Of Geophysical Research (Space Physics)

Bibtex

@article{https://doi.org/10.1029/2024JA032735,
author = {Hao, Y.-X. and Shprits, Y. Y. and Menietti, J. D. and Averkamp, T. and Wang, D. D. and Kollmann, P. and Hospodarsky, G. B. and Drozdov, A. and Saikin, A. and Roussos, E. and Krupp, N. and Horne, R. B. and Woodfield, E. E. and Bolton, S. J.},
title = {Acceleration of Energetic Electrons in Jovian Middle Magnetosphere by Whistler-Mode Waves},
journal = {Journal of Geophysical Research: Space Physics},
volume = {129},
number = {12},
pages = {e2024JA032735},
keywords = {wave-particle interaction, radiation belt, Jupiter, whistler-mode waves, particle acceleration, Fokker-Planck equation},
doi = {https://doi.org/10.1029/2024JA032735},
url = {https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2024JA032735},
eprint = {https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2024JA032735},
note = {e2024JA032735 2024JA032735},
abstract = {Abstract An abundant multi-MeV electron population beyond the orbit of Io is required to explain the intense inner radiation belt (electrons >50 ${ >} 50$ MeV) at Jupiter and its synchrotron radiation. In order to better understand the synergistic effect of radial transport and local wave-particle interactions driven by whistler-mode waves on the formation of Jupiter's radiation belt, we perform 3-D Fokker-Planck simulations for Jovian energetic electrons with the Versatile Electron Radiation Belt code. An empirical model of Jovian whistler-mode waves updated with measurements from the Juno extended mission is used to quantify the local acceleration and pitch angle scattering. Resonant cyclotron acceleration by whistler-mode waves leads to significant enhancement in the intensity of electrons above 1 MeV in the middle magnetosphere. Radial diffusion is capable of transporting MeV electrons accelerated by outer-belt whistler-mode waves into the M<10 $M< 10$ region, where they are further accelerated adiabatically to energies of about 10 MeV.},
year = {2024}
}