Energetic electrons in the inner part of the Jovian magnetosphere and their relation to auroral emissions
Energetic electrons in the inner part of the Jovian magnetosphere and their relation to auroral emissions
复制标题
木星磁层内部的高能电子及其与极光发射的关系
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
W. Kurth
中科院分区：
文献类型：
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作者：
Ana Teresa Tomás;J. Woch;N. Krupp;A. Lagg;K. Glassmeier;W. Kurth
[1] 木星磁层中的高能粒子分布在内磁层和中磁层之间变化显着。最显着的变化之一是电子俯仰角分布（PAD）从薄饼状分布转变为双向分布。这种转变是一个持久且局部的特征，定义了 10 到 17 RJ 之间的明显空间边界。我们讨论了 PAD 边界与木星极光中一些观测到的结构之间可能的关系。哈勃太空望远镜的观测结果与预测的 PAD 边界电离层足迹之间的比较表明，两者之间存在良好的相关性，在主极光椭圆形的赤道方向有一条离散的发射带。此外，与 PAD 边界处的高能电子分布相关的降水能量通量与这些极光发射的亮度范围兼容。
[1] The energetic particle distribution in the magnetosphere of Jupiter changes significantly between the inner and the middle magnetosphere. One of the most prominent changes is a transition of the electron pitch angle distribution (PAD) from a pancake to a bidirectional distribution. The transition is a persistent and localized feature defining a distinct spatial boundary between 10 and 17 RJ. We discuss the possible relation between the PAD boundary and some of the observed structures in the Jovian aurora. A comparison between the Hubble Space Telescope observations and the predicted ionospheric footprints of the PAD boundary indicates a good correlation, with a discrete belt of emissions equatorward of the main auroral oval. Furthermore, the precipitation energy flux associated with the energetic electron distribution at the PAD boundary is compatible with the brightness range of these auroral emissions.