Low-frequency hiss-like whistler-mode waves generated by nonlinear three-wave interactions outside the plasmasphere
Low-frequency hiss-like whistler-mode waves generated by nonlinear three-wave interactions outside the plasmasphere
复制标题
等离子层外非线性三波相互作用产生的低频嘶嘶声口哨模式波
DOI：
10.1063/1.5115542
复制
发表时间：
2019
影响因子：
2.2
通讯作者：
Fengsi Wei
中科院分区：
文献类型：
--
作者：
Zhonglei Gao;Zhengyang Zou;Pingbing Zuo;Yi Wang;Zhaoguo He;Fengsi Wei
哨声波在内磁层粒子动力学中起着重要的作用。波与粒子之间能量传递的方向和效率强烈地依赖于波的频率分布特性。最近的观测结果引起了人们对等离子体外低于0.1倍赤道电子回旋频率fce的低频哨声模式合唱波的注意。本文在分析货车艾伦探针波资料的基础上，描述了一种新的低频类哨声波，其频率在0.1fce左右。结果表明，被0.5fce能隙分裂的两个正常合唱波带通过非线性三波相互作用可以产生低频的类嘶嘶声哨声波，哨声波在内磁层粒子动力学中起着重要作用。波与粒子之间能量传递的方向和效率强烈地依赖于波的频率分布特性。最近的观测结果引起了人们对等离子体外低于0.1倍赤道电子回旋频率fce的低频哨声模式合唱波的注意。本文在分析货车艾伦探针波资料的基础上，描述了一种新的低频类哨声波，其频率在0.1fce左右。结果表明，被0.5fce带隙分裂的两个正常合唱波带通过非线性三波相互作用可以产生低频类嘶嘶哨声波。
Whistler-mode waves play an important role in the inner magnetospheric particle dynamics. The direction and efficiency of energy transfer between waves and particles strongly depend on the wave frequency distribution characteristics. Recent observations have drawn attention to the low-frequency whistler-mode chorus waves below 0.1 times the equatorial gyrofrequency f ce of electrons outside the plasmasphere. Here, on the basis of the analysis of the Van Allen Probes wave data, we describe a new type of low-frequency hiss-like whistler-mode wave around or below 0.1 f ce. We show that two normal chorus wave bands split by the 0.5 f ce gap can produce the low-frequency hiss-like whistler-mode waves through the nonlinear three-wave interaction.Whistler-mode waves play an important role in the inner magnetospheric particle dynamics. The direction and efficiency of energy transfer between waves and particles strongly depend on the wave frequency distribution characteristics. Recent observations have drawn attention to the low-frequency whistler-mode chorus waves below 0.1 times the equatorial gyrofrequency f ce of electrons outside the plasmasphere. Here, on the basis of the analysis of the Van Allen Probes wave data, we describe a new type of low-frequency hiss-like whistler-mode wave around or below 0.1 f ce. We show that two normal chorus wave bands split by the 0.5 f ce gap can produce the low-frequency hiss-like whistler-mode waves through the nonlinear three-wave interaction.