Whistler Wings and Reflected Particles During Solar Wind Interaction of Lunar Magnetic Anomalies
Whistler Wings and Reflected Particles During Solar Wind Interaction of Lunar Magnetic Anomalies
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DOI：
10.1029/2021gl092425
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发表时间：
2021-01
影响因子：
5.2
通讯作者：
Hui Zhang;Yong Wei;J. Zhong;Tianxin Zhang;Libo Liu;B. Ni;J. Cao;S. Fu;Yiding Chen;S. Fu;W. Wan
中科院分区：
文献类型：
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作者：
Hui Zhang;Yong Wei;J. Zhong;Tianxin Zhang;Libo Liu;B. Ni;J. Cao;S. Fu;Yiding Chen;S. Fu;W. Wan
由于缺乏现场观测，小尺度月球磁异常的太阳风相互作用仍然没有解决。在这里建立了一个专用的坐标系来重建这种相互作用的两个遥感症状的分布：低频哨声和反射质子。发现这些哨声在月球旁边形成了一对翅膀，它们来自低海拔的相互作用区域，而不是来自反射质子到达的更高海拔，可能会形成相关的冲击。电子和质子在相互作用区的行为可能不同。入射电子保持在流体状态，并可能被异常转移，激发低频哨声。然而，质子变得非磁化，并被垂直电场镜面反射。这些电场可能来自电子和质子的电荷分离/不同运动，尽管不能完全排除低空冲击的存在。
The solar wind interaction of small‐scale lunar magnetic anomalies remains unsolved due to lack of in situ observations. A dedicated coordinate system is established here to reconstruct the distributions of two remotely sensed symptoms of this interaction: the low‐frequency whistlers and reflected protons. It is found that these whistlers form a pair of wings beside the Moon and they originate from the low‐altitude interaction region, instead of from the higher altitudes where the reflected protons arrive and the associated shocks possibly form. Electrons and protons may behave differently in the interaction region. The incident electrons remain in a fluid state and may be diverted by the anomalies, exciting the low‐frequency whistlers. The protons, however, become unmagnetized and are reflected specularly by the vertical electric fields. These electric fields may derive from the charge separation/different motions of the electrons and protons, although the presence of low‐altitude shocks cannot be ruled out completely.