Effects of Ion Temperature and Inertia on Kinetic Alfvén Waves理论物理通讯：英文版论文
【题名】：Effects of Ion Temperature and Inertia on Kinetic Alfvén Waves理论物理通讯：英文版论文(Effects of Ion Temperature and Inertia on Kinetic Alfvén WavesLiLunWuLiTongXun：YingWenBanLunWen) 【关键词】：等离子体 阿耳文波 色散关系 离子温度 惯量 【keywords】：DengLiZiTi AErWenBo SeSanGuanXi LiZiWenDu GuanLiang 【作者】：WUDe－Jin      【来源】： 知识词典 【期刊名称】：理论物理通讯：英文版(LiLunWuLiTongXun：YingWenBan) 【国际标准刊号】：0253-6102        【国内统一刊号】：11-2592 【作者单位】：PurpleMountainObservatory,theChineseAcademyofSciences,Nanjing210008,China(PurpleMountainObservatory,theChineseAcademyofSciences,Nanjing210008,China) 【分类号】：O53      【页码】：-457-464      【出版年】：2003.4         Kinetic Alfvén wave(KAW) has been an interesting topic for discussion extensively in the fields of laboratory,space,and astrophysical plasmas.A general dispersion equation is derived from the exact two-fluid model in this paper.Based on this dispersion equation,dispersion of Alfvén waves near the Alfvén frequency wA=VAK||are discussded for arbitrary values of wavelength,where vA is the Alfvén velocity,and κ||=2π/λ|| is the wavenumber parallel to the ambient magnetic field.For the short wavelength cases of κλi>>1,where λi=Va/ωci and ωci are the ion inertial length and gyrofrequency'''''''',respectively,our dispersion relations are appropriate for discussing effects of the ion temperature and inertia on KAWs,The present results show that both the ion temperature and inertia can affect considerably the behaviors of KAWs in propagaiton,resonance,and polarization.In particular,our results may be a great help to understanding some salient features of the low-frequency(in comparison with the ion gyrofrequency ωci)electromagnetic fluctuations frequently observed by the FREJA and FAST satellites in the auroral zone of the Earth''''''''s ionsphere and magnetosphere.
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