C+ pickup ions in the heliosphere and their origin
C+ pickup ions in the heliosphere and their origin
复制标题
C 在日光层中的拾取离子及其起源
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
R. Steiger
中科院分区：
文献类型：
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作者：
J. Geiss;G. Gloeckler;L. Fisk;R. Steiger
C ~+拾取离子是在太阳风离子成分谱仪上发现的。而其他非本地发生的皮卡离子产生的星际气体深入到日光层，C +来自一个内部的来源，位于太阳距离的几个Au，并在所有日光层纬度的延伸调查到目前为止。这个内源产生的C +、N +和O +的总量是日球层星际气体产生的O +总量的10 −3。因此，内源对异常宇宙线（ACR）中的氧或氮没有显著贡献，但其对ACR碳的贡献可能不可忽略。我们认为，内源物质是从谷物中蒸发出来的碳化合物。目前，证据表明星际颗粒是主要来源，但我们不想排除来自太阳系的颗粒的贡献。
C + pickup ions were discovered with the solar wind ion composition spectrometer flying on Ulysses. Whereas the other nonlocally occurring pickup ions are produced from the interstellar gas penetrating deep into the heliosphere, C + comes from an inner source which is located at a solar distance of a few AU and extends over all heliospheric latitudes investigated so far. The total production of C + , N + , and O + by this inner source is of the order of 10 −3 relative to the total production of O + from the interstellar gas in the heliosphere. Thus the inner source does not significantly contribute to oxygen or nitrogen in the anomalous cosmic rays (ACR), but its contribution to ACR carbon may not be negligible. We propose that the inner source material is carbon compounds evaporating from grains. At this time, the evidence points to interstellar grains as the major source, but we do not want to exclude yet a contribution from grains of solar system origin.