In situ evidence of the magnetospheric cusp of Jupiter from Juno spacecraft measurements

Y. Xu, C. S. Arridge, Z. H. Yao (), B. Zhang, L. C. Ray, S. V. Badman, W. R. Dunn, R. W. Ebert, J. J. Chen, F. Allegrini, W. S. Kurth, T. S. Qin, J. E. P. Connerney, D. J. McComas, S. J. Bolton and Y. Wei
Additional contact information
Y. Xu: Institute of Geology and Geophysics, Chinese Academy of Sciences
C. S. Arridge: Lancaster University
Z. H. Yao: Institute of Geology and Geophysics, Chinese Academy of Sciences
B. Zhang: University of Hong Kong
L. C. Ray: Lancaster University
S. V. Badman: Lancaster University
W. R. Dunn: University College London
R. W. Ebert: Southwest Research Institute
J. J. Chen: University of Hong Kong
F. Allegrini: Southwest Research Institute
W. S. Kurth: University of Iowa
T. S. Qin: University of Hong Kong
J. E. P. Connerney: Space Research Corporation
D. J. McComas: Princeton University
S. J. Bolton: Southwest Research Institute
Y. Wei: Institute of Geology and Geophysics, Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract The magnetospheric cusp connects the planetary magnetic field to interplanetary space, offering opportunities for charged particles to precipitate to or escape from the planet. Terrestrial cusps are typically found near noon local time, but the characteristics of the Jovian cusp are unknown. Here we show direct evidence of Jovian cusps using datasets from multiple instruments onboard Juno spacecraft. We find that the cusps of Jupiter are in the dusk sector, which is contradicting Earth-based predictions of a near-noon location. Nevertheless, the characteristics of charged particles in the Jovian cusps resemble terrestrial and Saturnian cusps, implying similar cusp microphysics exist across different planets. These results demonstrate that while the basic physical processes may operate similarly to those at Earth, Jupiter’s rapid rotation and its location in the heliosphere can dramatically change the configuration of the cusp. This work provides useful insights into the fundamental consequences of star-planet interactions, highlighting how planetary environments and rotational dynamics influence magnetospheric structures.

Date: 2024
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DOI: 10.1038/s41467-024-50449-z

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