Investigation of magnetospheric interactions with the Hermean surface
Investigation of magnetospheric interactions with the Hermean surface
复制标题
磁层与赫米亚表面相互作用的研究
DOI：
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发表时间：
1997
期刊：
影响因子：
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通讯作者：
W. Ip
中科院分区：
文献类型：
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作者：
W. Ip
水星的磁层中充满了被捕获的粒子，其中很大一部分，当然是钠和钾成分，是由太阳紫外线，太阳风和被捕获的粒子本身溅射表面产生的。水星的表面被这些过程广泛地改变，因此对水星来说，对表面和磁层的研究形成了一个单一的问题。描述了水星表面与磁层之间关系的现有证据。因此，我们认为新的仪器方法，直接解决耦合的辐射环境与表面。其中一种仪器是中性原子成像仪。由于中性粒子沿弹道轨迹飞行，但其动能大于逃逸能量，因此可以将获得的有关表面的信息与地理上明确定义的区域联系起来。不同的能量产生不同耦合过程的信息。我们还可以获得有关该系统的全球能量输入的信息。水手号观测到的强烈辐射水平表明，高能辐射与表面相互作用的极光区是一个潜在的强X射线源。我们估计通量。太阳风也可能有助于X射线的产生，特别是如果它能在高度激发的时期到达表面。(C)1997年空间研委会。爱思唯尔科技有限公司出版
The magnetosphere of Mercury is populated by trapped particles, of which a significant proportion, certainly the Sodium and Potassium components, are generated by sputtering of the surface by solar UV, solar wind and by the trapped particles themselves. The surface is extensively modified by these processes, so that for Mercury studies of the surface and the magnetosphere form a single linked problem. The available evidence on the relationship between Mercury's surface and magnetosphere is described. We therefore consider new instrumental approaches to address directly the coupling of the radiation environment with the surface. One such instrument would be a neutral atom imager. Since neutrals travel on ballistic trajectories, but can have kinetic energies large compared to escape energy, it is possible to relate the information obtained about the surface to geographically well defined regions. Different energies yield information on different coupling processes. We can also obtain information on the global energy inputs to the system. The intense level of the radiation observed by Mariner suggests that the auroral zone, where the energetic radiation interacts with the surface, is a potential strong source of X-rays. We estimate the fluxes. The solar wind may also contribute to X-ray generation, particularly if it can reach the surface during highly excited periods. (C) 1997 COSPAR. Published by Elsevier Science Ltd.