On the ionosphere of Triton: An evaluation of the magnetospheric electron precipitation and photoionization effects

研究成果: 雜誌貢獻期刊論文同行評審

9 引文 斯高帕斯(Scopus)

摘要

In order to explore the origin and physical nature of the ionosphere of Triton, a simple, 2‐dimensional electron drift model is developed to approximate the ionization effect of magnetospheric electrons. The derived profile of ion production rate is then applied to a steady‐state photochemical model calculation. It is shown that, as a result of the very low CH4 mixing ratio in Triton's atmosphere, the most dominant ion in the upper ionosphere could be N+. There are, however, difficulties in explaining the electron number density profile below 500 km as inferred from the radio science experiment on Voyager 2. One major factor is the increasing importance of the ion chemistry involving N+ and H2 from CH4 photolysis in this region. This problem may be partially resolved if we invoke a more efficient electron transport in the atmosphere or the possible presence of metallic ions like Si+, Ne+ and Na+ which do not react with N2 and H2 in the lower ionosphere.

原文???core.languages.en_GB???
頁(從 - 到)1713-1716
頁數4
期刊Geophysical Research Letters
17
發行號10
DOIs
出版狀態已出版 - 9月 1990

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