Mercury's Exosphere explored by BepiColombo mission

Bibliographic Information

Other Title
  • 水星大気の生成メカニズムに関する研究 : MMO搭載機器MSASIでの観測に向けて

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Description

Mercury's Sodium Atmosphere Spectral Imager (MSASI) on BepiColombo is under development. MSASI is a high-dispersion visible spectrometer working in the spectral range around sodium D2 emission using a Fabry-Perot interferometer (FPI). Discoveries of Na, K and Ca from the ground-based observations clearly arise that the regolith of Mercury releases a fraction of its content to the atmosphere. Some processes are proposed up to now as release mechanisms, e.g. (1) Photon-stimulated desorption, (2) Ion sputtering, and (3) Micro-meteoroid impact/vaporization. Here we use 3D Monte Carlo simulation in these cases to describe the images taken by MSASI. We can see specific spatial distributions of the Mercury atmosphere in each process. Therefore we conclude that MSASI can identify the mechanism of the Mercury atmosphere comparing with our simulation result.

Journal

Details 詳細情報について

  • CRID
    1570572701988947200
  • NII Article ID
    110004849179
  • NII Book ID
    AA1192675X
  • ISSN
    13491113
  • Text Lang
    ja
  • Data Source
    • CiNii Articles

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