yao_2024_Recent advances in the magnetic reconnection dipolarization and auroral processes at giant planets from the perspective of comparative planetology.pdf
magnetic depolarization; magnetic reconnection; magnetosphere; Auroral process; Cassini; Comparative planetology; Dipolarization; Energization; Giant planets; Jupiters; Magnetic depolarization; Magnetic reconnections; Magnetospheric dynamics; Astronomy and Astrophysics; Atmospheric Science; Space and Planetary Science
Abstract :
[en] Magnetic reconnection and dipolarization are crucial processes driving magnetospheric dynamics, including particle energization, mass circulation, and auroral processes, among others. Recent studies have revealed that these processes at Saturn and Jupiter are fundamentally different from the ones at Earth. The reconnection and dipolarization processes are far more important than previously expected in the dayside magnetodisc of Saturn and potentially Jupiter. Dayside magnetodisc reconnection was directly identified by using Cassini measurements (Guo RL et al., 2018b) and was found to be drizzle-like and rotating in the magnetosphere of Saturn (Delamere et al., 2015b; Yao ZH et al., 2017a; Guo RL et al., 2019). Moreover, magnetic dipolarization could also exist at Saturn’s dayside (Yao ZH et al., 2018), which is fundamentally different from the terrestrial situation. These new results significantly improve our understanding of giant planetary magnetospheric dynamics and provide key insights revealing the physics of planetary aurorae. Here, we briefly review these recent advances and their potential implications for future investigations.
Research Center/Unit :
STAR - Space sciences, Technologies and Astrophysics Research - ULiège
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Yao, ZhongHua; Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
Guo, Ruilong ; Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, China
Wei, Yong; Key Laboratory of Earth and Planetary Physics, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing, China
Bonfond, Bertrand ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Grodent, Denis ; Université de Liège - ULiège > Département d'astrophysique, géophysique et océanographie (AGO) > Labo de physique atmosphérique et planétaire (LPAP)
Zhang, BinZheng; Department of Earth Sciences, The University of Hong Kong, Pokfulam, Hong Kong
Dunn, William R.; Department of Physics and Astronomy, University College London, London, United Kingdom
Pu, ZuYin; School of Earth and Space Sciences, Peking University, Beijing, China
Language :
English
Title :
Recent advances in the magnetic reconnection, dipolarization, and auroral processes at giant planets from the perspective of comparative planetology
Z. Y. acknowledges the National Natural Science Foundation of China (Grant No. 42074211). The authors wish to thank the International Space Science Institute in Beijing (ISSI-BJ) for supporting and hosting the meetings of the International Team on \u201CThe Morphology of Auroras at Earth and Giant Planets: Characteristics and Their Magnetospheric Implications,\u201D during which the discussions leading or contributing to this publication were initiated or held.
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