Heliospheric filtration of interstellar heavy atoms: Sensitivity to hydrogen background
Heliospheric filtration of interstellar heavy atoms: Sensitivity to hydrogen background
复制标题
星际重原子的日光层过滤：对氢背景的敏感性
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
G. Zank
中科院分区：
文献类型：
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作者：
H. Müller;G. Zank
[1] 日光层周围的星际介质中存在重元素，包括 He、C、N、O、Ne 和 Ar。它们构成了日光层中重拾取离子和异常宇宙射线的最重要来源。动力学数值模型用于研究这六种重元素物质的中性粒子和单电荷离子的入口和日光层分布，因为它们通过电荷交换与日光层的中性和电离氢相互作用。由于星际氢参数尚不清楚，因此采用三种不同的代表性氢日光层模型来研究重元素分布，并建立了关键结果（包括重元素过滤率和增加的重中性密度（壁））对不同氢背景的敏感性。关键的中性重元素结果很大程度上对氢背景的具体情况不敏感。中性元素特征的位置和范围敏感地取决于氢背景，所有重离子结果也是如此。
[1] Heavy elements including He, C, N, O, Ne, and Ar are present in the interstellar medium surrounding the heliosphere. They form the most important source for heavy pickup ions and anomalous cosmic rays in the heliosphere. Kinetic numerical models are used to study the entrance and the heliospheric distribution of neutrals and singly charged ions of these six heavy element species as they interact through charge exchange with the neutral and ionized hydrogen of the heliosphere. Since the interstellar hydrogen parameters are not known precisely, three different representative hydrogen heliospheric models are used to study the heavy element distribution, and the sensitivity of key results, including filtration ratios of heavy elements and increased heavy neutral densities (walls), to the different hydrogen backgrounds is established. The key neutral heavy element results are largely insensitive to the specifics of the hydrogen background. The location and extent of neutral element features depends sensitively on the hydrogen background, as do all the heavy ion results.