Lumikot: Fast Auroral Transients During the Growth Phase of Substorms
Lumikot: Fast Auroral Transients During the Growth Phase of Substorms
复制标题
Lumikot：亚暴发展阶段的快速极光瞬变
DOI：
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发表时间：
2019
影响因子：
5.2
通讯作者：
N. Partamies
中科院分区：
文献类型：
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作者：
D. McKay;T. Paavilainen;B. Gustavsson;A. Kvammen;N. Partamies
磁层亚暴的发展可分为三个阶段：增长、扩展和恢复。增长阶段很重要，因为它包括导致扩张的过程。在最近的一项生长阶段研究中，观察到一种快速离散的极光瞬态现象-称为Lumikot。Lumikot有几公里宽，在高能降水区移动，平行于主要的生长阶段弧，在同一事件中有东西和东西两个方向的旅行。它们明显的横向运动和准稳定的强度使它们与同时发生的光学脉动极光不同。与其他研究的比较表明，它们发生在宇宙噪声吸收区，并且Lumikot可能与外辐射带和等离子体之间边界上的高能粒子群共存。
The development of a magnetospheric substorm may be classified into three phases: growth, expansion, and recovery. The growth phase is important as it includes processes that lead to the expansion. In a recent growth‐phase study, a type of fast discrete auroral transient phenomena—referred to as Lumikot—were observed. The Lumikot are several kilometers across and move in the high‐energy precipitation region, parallel to the main growth‐phase arc, with both east‐west and west‐east directions of travel during the same event. Their apparent transverse movement and quasi‐stable intensity make them distinct from cooccurring optical pulsating aurorae. Comparison to other studies show that they occur in the cosmic noise absorption region and it is likely that the Lumikot are colocated with high‐energy particle populations on the boundary between the outer radiation belt and the plasmasheet.