Neutral Clouds and Their Influence on Pick‐up Ions in Saturn’s Magnetosphere
Neutral Clouds and Their Influence on Pick‐up Ions in Saturn’s Magnetosphere
复制标题
中性云及其对土星磁层中拾取离子的影响
DOI：
--
复制
发表时间：
2010
期刊：
影响因子：
--
通讯作者：
H. Smith
中科院分区：
文献类型：
--
作者：
H. Smith
土星系统的有趣之处在于它的磁层由中性粒子主导。最初人们认为，土星的大卫星土卫六的大气层中密度较大、相对暴露的氮气是重粒子的最大来源。然而，基于最近卡西尼号观测的研究证实，微小的冰冻卫星土卫二是土星磁层中重粒子(水团)的主要来源。土星的大气层、土卫六和土卫二也是氢粒子的重要来源。这些动态源对离子源产生机制有有趣的影响，离子源产生机制随后改变中性粒子分布。因此，拾取离子的来源和分布受这些中性粒子的影响很大，反之亦然。在这里，我们概述了土星磁层中性粒子的分布，以及这种分布如何影响拾取离子的产生。我们还展示了如何利用对这些离子的检测来识别神经网络。
The Saturnian system is interesting in that its magnetosphere is dominated by neutral particles. It was originally thought that the dense, relatively exposed nitrogen dominated atmosphere of Saturn’s large moon, Titan, was the largest source of heavy particles. However, research based on recent Cassini observations confirm that the tiny icy moon Enceladus serves as the dominate source of heavy particles (water group) in Saturn’s magnetosphere. Saturn’s atmosphere and Titan as well as Enceladus also provide a significant source of hydrogen particles. These dynamic sources have interesting implications for ion source generation mechanisms which then modify the neutral particle distribution. Thus, pick‐up ion sources and distribution is highly influenced by these neutral particles and vice versa. Here we present an overview of Saturn’s magnetospheric neutral particle distribution and how this distribution affects pick‐up ion production. We also show how detection of these ions has been used to identify neutr...