Transpolar arc observation after solar wind entry into the high-latitude magnetosphere
Transpolar arc observation after solar wind entry into the high-latitude magnetosphere
复制标题
太阳风进入高纬磁层后的跨极弧观测
DOI：
10.1002/2014ja020912
复制
发表时间：
2015
影响因子：
2.8
通讯作者：
Pu Z. Y.
中科院分区：
文献类型：
--
作者：
Mailyan B.;Shi Q. Q.;Kullen A.;Maggiolo R.;Zhang Y.;Fear R. C.;Zong Q. -G.;Fu S. Y.;Gou X. C.;Cao X.;Yao Z. H.;Sun W. J.;Wei Y.;Pu Z. Y.
最近，星团观测揭示了在尖点区域尾部的高纬度磁层叶中存在新的太阳风等离子体进入区域，主要是在向北的行星际磁场期间。在这项研究中，从全球紫外线成像仪（GUVI）的TIMED航天器上的实验和宽带成像相机成像仪上的IMAGE卫星的观测被用来调查太阳风进入和形成的极冠跨极弧之间的可能联系。我们专注于一个情况下，当transpolar弧形成两次观察后，两个太阳风进入事件被发现的集群航天器。此外，GUVI和IMAGE观测显示，在第二次进入事件之后，低纬度和高纬度同时发生极光活动，可能表明跨极弧连续带的两部分结构。
Recently, Cluster observations have revealed the presence of new regions of solar wind plasma entry at the high‐latitude magnetospheric lobes tailward of the cusp region, mostly during periods of northward interplanetary magnetic field. In this study, observations from the Global Ultraviolet Imager (GUVI) experiment on board the TIMED spacecraft and Wideband Imaging Camera imager on board the IMAGE satellite are used to investigate a possible link between solar wind entry and the formation of transpolar arcs in the polar cap. We focus on a case when transpolar arc formation was observed twice right after the two solar wind entry events were detected by the Cluster spacecraft. In addition, GUVI and IMAGE observations show a simultaneous occurrence of auroral activity at low and high latitudes after the second entry event, possibly indicating a two‐part structure of the continuous band of the transpolar arc.