Recent advances in the magnetic reconnection,dipolarization,and auroral processes at giant planets from the perspective of comparative planetology  

作　　者：ZhongHua Yao RuiLong Guo Yong Wei Bertrand Bonfond Denis Grodent BinZheng Zhang William R.Dunn ZuYin Pu 

机构地区：[1]Key Laboratory of Earth and Planetary Physics,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China [2]College of Earth and Planetary Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [3]Laboratoire de Physique Atmosphérique et Planétaire,STAR Institute,Universitéde Liège,B-4000 Liège,Belgium [4]Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment,Institute of Space Sciences,Shandong University,Weihai Shandong 264209,China [5]Department of Earth Sciences,the University of Hong Kong,Pokfulam,Hong Kong SAR,China [6]Department of Physics and Astronomy,University College London,London WC1E 6BT,UK [7]School of Earth and Space Sciences,Peking University,Beijing 100871,China

出　　处：《Earth and Planetary Physics》2024年第5期659-672,共14页地球与行星物理（英文版）

基　　金：Z.Y.acknowledges the National Natural Science Foundation of China(Grant No.42074211).

摘　　要：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.

关 键 词：MAGNETOSPHERE magnetic reconnection magnetic depolarization 

分 类 号：P185[天文地球—天文学]