Two types of mirror mode waves in the Kronian magnetosheath  

作　　者：XinYa Duanmu ZhongHua Yao Yong Wei ShengYi Ye 

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]Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen Guangdong 518055,China

出　　处：《Earth and Planetary Physics》2023年第3期414-420,共7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);the Key Research Program of the Institute of Geology&Geophysics,Chinese Academy of Sciences(Grant No.IGGCAS-201904).

摘　　要：A mirror mode wave is a fundamental magnetic structure in the planetary space environment that is persistently compressed by solar wind,especially in the magnetosheath.Mirror modes have been widely identified in the magnetosheaths of the Earth and other planets in the solar system,yet the understanding of mirror mode waves on extraterrestrial planets is not as comprehensive as that on the Earth.Using magnetic field data collected by the Cassini spacecraft,we found peak and dip types according to the magnetic morphology(i.e.,structures with higher or lower magnetic strengths than the background field).Moreover,mirror mode waves and electromagnetic ion cyclotron waves were found one after the other,implying that the two wave modes may evolve into one another in the Kronian magnetosheath.The results indicate that many fundamental plasma processes associated with the mirror mode structure exist in the Kronian magnetosheath.The energy conversion in Saturn’s magnetosheath may provide key insights that will aid in understanding giant planetary magnetospheric processes.

关 键 词：mirror mode wave CASSINI Kronian magnetosheath electromagnetic ion cyclotron wave 

分 类 号：P353[天文地球—空间物理学]