Corotation-bounce resonance of ions in Jupiter's magnetosphere
Space Physics
2025-02-11 v2 Earth and Planetary Astrophysics
Abstract
Banded energy distributions of H, O, S, and O or S ions between 100 eV to ~20 keV are consistently observed in Jupiter's magnetosphere mapping to M-shells between M=10-20. The bands correspond to flux enhancements at similar speeds for different ion species, providing the first evidence of simultaneous bounce-resonant acceleration of multiple ion species in Jupiter's magnetosphere. Ion enhancements occur for energies at which the bounce frequencies of the trapped ions matched integer harmonics of the System-III corotation frequency. The observations highlight a previously unknown interaction between corotation and bounce motion of <10 keV energy ions that is a fundamental and persistent process occurring in Jupiter's magnetosphere.
Keywords
Cite
@article{arxiv.2410.17304,
title = {Corotation-bounce resonance of ions in Jupiter's magnetosphere},
author = {Y. Sarkango and J. R. Szalay and P. A. Damiano and A. H. Sulaiman and P. A. Delamere and J. Saur and D. J. McComas and R. W. Ebert and F. Allegrini},
journal= {arXiv preprint arXiv:2410.17304},
year = {2025}
}