An analysis of magnetic reconnection events and their associated auroral enhancements
An analysis of magnetic reconnection events and their associated auroral enhancements
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DOI：
10.1002/2016ja023586
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发表时间：
2017-03
期刊：
影响因子：
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通讯作者：
Nathan Case;A. Grocott;Stephen E. Milan;T. Nagai;J. Reistad
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文献类型：
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作者：
Nathan Case;A. Grocott;Stephen E. Milan;T. Nagai;J. Reistad
对近地磁尾的同时重联事件和极光的增强进行了分析。利用地磁尾、星团和双星星星飞行任务的磁层数据，沿着IMAGE和极地飞行任务的极光图像，探讨了重联信号与极光信号之间的关系。在59个合适的重连事件的研究中，我们发现43个表现出明显的重连和极光增强的一致性。这43个重联事件的磁地方时（MLT）位置通常位于相关极光增强的±1小时MLT范围内。两个MLT位置之间的正相关系数为0.8，增强是局部的，持续时间短（τ≤10 min），在亚暴过程中和孤立的亚暴一样可能发生。没有发现重连或极光增强位置对太阳风速度（Vy），IMF（By）或本地By或Vy的黄昏-黎明分量的显著依赖性，如重连探测航天器所测量的。
An analysis of simultaneous reconnection events in the near‐Earth magnetotail and enhancements in the aurora is undertaken. Exploiting magnetospheric data from the Geotail, Cluster, and Double Star missions, along with auroral images from the IMAGE and Polar missions, the relationship between a reconnection signature and its auroral counterpart is explored. In this study of 59 suitable reconnection events, we find that 43 demonstrate a clear coincidence of reconnection and auroral enhancement. The magnetic local time (MLT) locations of these 43 reconnection events are generally located within ±1 h MLT of the associated auroral enhancement. A positive correlation coefficient of 0.8 between the two MLT locations is found. The enhancements are localized and short‐lived (τ≤10 min) and are as likely to occur during the substorm process as in isolation of a substorm. No significant dependence of the reconnection or auroral enhancement location on the dusk‐dawn components of the solar wind velocity (Vy), IMF (By) or local By or Vy, as measured by the reconnection‐detecting spacecraft, is found.