Effects of displacement current on wave dispersion relation and polarization properties in auroral plasmas

作     者：Liang Xiang Bing Ma Qiu-Huan Li Ling Chen Hong-Wei Yu De-Jin Wu Liang Xiang;Bing Ma;Qiu-Huan Li;Ling Chen;Hong-Wei Yu;De-Jin Wu

作者机构：Institute of Space PhysicsLuoyang Nonnal UniversityLuoyang 471934China Department of Physics and Synergetic Innovation Center for Quantum Effects and ApplicationsSchool of Physics and ElectronicsHunan Normal UniversityChangsha 410081China Key Laboratory of Planetary SciencesPurple Mountain ObservatoryChinese Academy of SciencesNanjing 210034China University of Science and Technology of ChinaHefei 230026China 

出 版 物：《Research in Astronomy and Astrophysics》 (天文和天体物理学研究（英文版）)

年 卷 期：2021年第21卷第10期

页      面：108-118页

核心收录：

学科分类：070802[理学-空间物理学] 07[理学] 0708[理学-地球物理学] 

基　　金：supported by the Science and Technology Innovation Program of Hunan Province(2020RC2049) the National Natural Science Foundation of China under grants 12103018,41531071,11873018,11690034,and 12075084 

主　　题：waves magnetohydrodynamics(MHD) planets and satellites:aurorae 

摘      要：In-situ observations from the FREJA magnetospheric research satellite and the Fast Auroral SnapshoT satellite have shown that plasma waves are frequently observed in the auroral plasma,which are believed to be fundamentally important in wave energy dissipation and particle ***,the effects of a displacement current on these waves have not been *** on the two-fluid theory,we investigate the dispersion relation and polarization properties of fast,Alfven,and slow modes in the presence of a displacement current,and the effects of the displacement current on these waves are also *** results show that the wave frequency,polarization,magnetic helicity and other properties for the fast and Alfven modes are highly sensitive to the normalized Alfven velocity v_(A)/c,plasma beta β,and propagation angle θ,while for the slow mode the dependence is *** particular,for both fast and Alfven modes,the magnetic helicity is obviously different with and without the displacement current,especially for the Alfven mode with the helicity reversals from right-handed to left-handed when v_(A)/c increases from 0 to *** charge-neutral condition of both fast and Alfven modes with frequencies larger than the proton cyclotron frequency is invalid in the presence of the displacement ***,the presence of the displacement current leads to relatively large magnetic compressibility for the Alfven mode and relatively large electron compressibility for the fast *** results can be useful for a comprehensive understanding of the wave properties and the physics of particle energization phenomena in auroral plasmas.