Properties of hot electrons in the Jovian inner magnetosphere deduced from extended observations of the Io Plasma Torus
Properties of hot electrons in the Jovian inner magnetosphere deduced from extended observations of the Io Plasma Torus
复制标题
通过对木卫一等离子体环的扩展观测推导出木星内部磁层中热电子的特性
DOI：
10.1002/2016gl070706
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
M.
中科院分区：
文献类型：
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作者：
Yoshikawa;I.; Yoshioka;K.; Murakami;G.; Suzuki;F.; Hikida;R.; Yamazaki;A.; Kimura;T.; Tsuchiya;F.; Kagitani;M.; Sakanoi;T.; Uemizu;K.; Tao;C.; Nozawa;H.; Kasaba;Y.; Fujimoto;M.
木星磁层物理学的一个焦点是能量和粒子向内部区域的传输。虽然中磁层的爆炸性能量释放事件表现为极光瞬变，但由于观测稀少，尚未研究其与内部的联系。在这里，我们利用极紫外线光谱仪对位于内磁层的极地极光和木卫一等离子体环（IPT）进行长期和准连续的同时监测。对几个小时的时间特性的研究使我们能够看到中间和内部磁层之间的缓慢（~10小时）耦合，以及量化IPT中热电子的温度。我们得到的参数，强粒子加速过程的特点。
One of the focal points of interest in Jovian magnetospheric physics is the transport of energy and particles into the inner region. While an explosive energy release event in the midmagnetosphere is manifested as an aurora transient, its connection to the inner part has not been investigated due to sparsity of observations. Here we take the advantage of long‐term and quasi‐continuous simultaneous monitoring of the polar aurora and the Io Plasma Torus (IPT) located in the inner magnetosphere by Extreme Ultraviolet Spectroscope for Exospheric Dynamics/Hisaki. Studies on temporal characteristics over hours enable us to see slow (~10 h) coupling between the middle and inner magnetosphere as well as to quantify the temperature of hot electrons in the IPT. We derive parameters that characterize the strong particle acceleration process.