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Proton Aurora and Optical Emissions in the Subauroral Region
Space Science Reviews ( IF 10.3 ) Pub Date : 2021-01-06 , DOI: 10.1007/s11214-020-00776-6
B. Gallardo-Lacourt , H. U. Frey , C. Martinis

Optical structures located equatorward of the main auroral oval often exhibit different morphologies and dynamics than structures at higher latitudes. In some cases, questions arise regarding the formation mechanisms of these photon-emitting phenomena. New developments in space and ground-based instruments have enabled us to acquire a clearer view of the processes playing a role in the formation of subauroral structures. In addition, the discovery of new optical structures helps us improve our understanding of the latitudinal and altitudinal coupling that takes place in the subauroral region. However, several questions remain unanswered, requiring the development of new instruments and analysis techniques. We discuss optical phenomena in the subauroral region, summarize observational results, present conclusions about their origin, and pose a number of open questions that warrant further investigation of proton aurora, detached subauroral arcs and spots, stable auroral red (SAR) arcs, and STEVE (Strong Thermal Emission Velocity Enhancement).

中文翻译:

亚极光区域的质子极光和光发射

位于主极光椭圆赤道方向的光学结构通常表现出与高纬度结构不同的形态和动力学。在某些情况下,会出现关于这些光子发射现象的形成机制的问题。空间和地面仪器的新发展使我们能够更清楚地了解在亚极光结构形成中发挥作用的过程。此外,新光学结构的发现有助于我们提高对发生在亚极光区域的纬度和海拔耦合的理解。然而,有几个问题仍未得到解答,需要开发新的仪器和分析技术。我们讨论了亚极光区域的光学现象,总结了观测结果,提出了关于它们起源的结论,
更新日期:2021-01-06
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