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A Possible Picture for the Connected Recurrent Magnetic Dipolarization, Quasi‐periodic ENA enhancement, SKR low frequency extension and Narrowband Emission at Saturn

Xu, Y; Yao, ZH; Ye, S‐Y; Badman, SV; Dialynas, K; Sergis, N; Ray, LC; ... Wei, Y; + view all (2023) A Possible Picture for the Connected Recurrent Magnetic Dipolarization, Quasi‐periodic ENA enhancement, SKR low frequency extension and Narrowband Emission at Saturn. Journal of Geophysical Research: Space Physics , 128 (9) , Article e2023JA031445. 10.1029/2023ja031445. Green open access

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Abstract

Magnetic Dipolarization, a hallmark indicator of the formation of field‐aligned currents, plays a crucial role in the energy dissipative processes that occur within planetary magnetospheres. Saturn’s magnetic dipolarization was found to recur after one planetary rotation, suggesting a potential correlation with the corotating current systems. The observation of enhanced Energetic Neutral Atoms (ENA) within Saturn's inner magnetosphere serves as a diagnostic tool, revealing the existence of a rotating, dynamic partial ring current system. By utilizing multiple datasets from Cassini, this study advances the understanding of the interrelationship between ENA emission and magnetic dipolarization. Our results suggest the possibility of a coupling between the Partial Ring Current system revealed by the ENA emission and magnetic dipolarization. Furthermore, a temporal correlation was found between the ENA emissions and two distinct radio emissions. This study discusses potential causal relationships among these phenomena and first time proposes a global unified physical picture.

Type: Article
Title: A Possible Picture for the Connected Recurrent Magnetic Dipolarization, Quasi‐periodic ENA enhancement, SKR low frequency extension and Narrowband Emission at Saturn
Open access status: An open access version is available from UCL Discovery
DOI: 10.1029/2023ja031445
Publisher version: https://doi.org/10.1029/2023ja031445
Language: English
Additional information: © 2023. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics
URI: https://discovery.ucl.ac.uk/id/eprint/10175732
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