The solar wind plasma is a major plasma source for the Earth's magnetosphere, which has a strong influence on the magnetotail plasma and field properties. The relative importance of different plasma entry mechanisms and pathways is largely determined by the solar wind conditions. Therefore, the spatial and temporal dependence of magnetotail plasma and field properties under different kinds of solar wind conditions is critically important for understanding the Earth's magnetosphere. This study presents a statistical study of fundamental magnetotail plasma properties in a normalized reference frame by utilizing 12+ years of data from NASA's Time History of Events and Macroscale Interactions during Substorms (THEMIS) mission. These statistical maps are mostly in agreement with the magnetosheath of MHD runs from the CCMC BATS‐R‐US model, but some features in the maps can be explained by kinetic particle physics, not present in the MHD. The results are also used to investigate the presence of any magnetotail plasma parameter asymmetries and their possible causes.

中文翻译：

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太阳风，磁石场和磁尾等离子体和场性质的统计研究：THEMIS观测和MHD模拟的12年以上

太阳风等离子体是地球磁层的主要等离子体源，它对磁尾等离子体和磁场特性有很大的影响。不同等离子体进入机制和途径的相对重要性在很大程度上取决于太阳风的条件。因此，在不同种类的太阳风条件下，磁尾等离子体和场特性的时空依赖性对于理解地球磁层至关重要。这项研究利用来自美国国家航空航天局（NASA）的事件时间历史和亚暴期间宏观相互作用的12年以上数据，对归一化参考系中的基本磁尾等离子体特性进行了统计研究。这些统计图与CCMC BATS-R-US模型中MHD的磁石强度基本一致，但是地图中的某些功能可以通过动力学粒子物理学来解释，而MHD中没有。结果还用于调查任何磁尾等离子体参数不对称的存在及其可能的原因。