Nonlinear vortex structures with diverging electric fields and their relation to the black aurora
Nonlinear vortex structures with diverging electric fields and their relation to the black aurora
复制标题
具有发散电场的非线性涡旋结构及其与黑极光的关系
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
T. Chang
中科院分区：
文献类型：
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作者：
J. Johnson;T. Chang
FREJA卫星观测到了大的径向发散电场，并与黑色极光卷曲有关。我们解释这些结构作为二维孤立的非线性等离子体波。根据观测，我们认为这些是缓慢传播的涡旋结构，沿着垂直于磁场的细长密度耗尽。我们证明，这些结构是本地化的空间（1公里的顺序），并可以有大的，向外定向的径向电场（1 V/m的顺序）的特点与FREJA观测一致。
Large, radially divergent electric fields have been observed by the FREJA satellite and have been associated with black auroral curls. We interpret these structures as two-dimensional solitary nonlinear plasma waves. In accordance with observation, we suggest that these are slowly propagating vortex structures traveling along elongated density depletions perpendicular to the magnetic field. We demonstrate that these structures are localized in space (the order of 1 km) and can have large, outwardly directed radial electric fields (the order of 1 V/m)—characteristics consistent with FREJA observations.