The sodium exosphere and magnetosphere of Mercury

研究成果: 雜誌貢獻期刊論文同行評審

90 引文 斯高帕斯(Scopus)

摘要

Following the recent optical discovery of intense sodium D‐line emission from Mercury, we explore the scenario of an extended exosphere of sodium and other metallic atoms. It is shown that the strong effect of solar radiation pressure acceleration would permit the escape of Na atoms from Mercury's surface even if they are ejected at velocity less than the surface escape velocity. Fast photoionization of the Na atoms is effective in limiting the tailward extension of the sodium exosphere, however. The subsequent loss of the photoions to the magnetosphere could be a significant source of the magnetospheric plasma. The recirculation of the magnetospheric charged particles to the planetary surface could also play an important role in maintaining an extended sodium exosphere as well as a magnetosphere of sputtered metallic ions.

原文???core.languages.en_GB???
頁(從 - 到)423-426
頁數4
期刊Geophysical Research Letters
13
發行號5
DOIs
出版狀態已出版 - 5月 1986

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