ULF Waves and Auroral Electrons
ULF Waves and Auroral Electrons
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ULF波和极光电子
DOI：
10.1029/169gm16
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
C. Chaston
中科院分区：
文献类型：
--
作者：
C. Chaston
高时间分辨率的场和粒子测量从航天器的可用性，使超低频波和极光场线上的场对齐的电子加速之间的明确的关联被建立。我们回顾了负责电子加速阿尔芬波的基本物理，并使用FAST和极地卫星的观测结果表明，这些观测结果与小横向尺度色散剪切阿尔芬波的双流体描述和通过电子加速耗散这些波是一致的。结果表明，这些波有效地加速大通量的场对准的电子进入极光椭圆，它是从多点测量表明，一个连续的能量供应沿着高纬度场线色散尺度上的阿尔芬波是需要考虑的意见。
The availability of high time resolution field and particle measurements from spacecraft has allowed a clear association between ULF waves and field-aligned electron acceleration on auroral field-lines to be established. We review the basic physics responsible for electron acceleration in Alfven waves and demonstrate using observations from the FAST and Polar satellites how these observations are consistent with a two-fluid description of small-transverse scale dispersive shear Alfven waves and the dissipation of these waves through electron acceleration. It is shown that these waves efficiently accelerate large fluxes of field-aligned electrons into the auroral oval and it is demonstrated from multi-point measurements that a continual energy supply along high latitude field-lines to Alfven waves on dispersive scales is required to account for observations.