| タイトル | Tomographic Reconstruction of Mercury's Exosphere from MESSENGER Flyby Data |
| 本文（外部サイト） | http://hdl.handle.net/2060/20110022412 |
| 著者（英） | Solomon, Sean C.; Killen, Rosemary M.; Slavin, James A.; Vervack, Ronald J., Jr.; McClintock, William E. |
| 著者所属（英） | NASA Goddard Space Flight Center |
| 発行日 | 2011-10-02 |
| 言語 | eng |
| 内容記述 | The exosphere of Mercury is among the best-studied examples of a common type of atmosphere, a surface-bounded exosphere. Mercury's exosphere was probed in 2008-2009 with Ultraviolet and Visible Spectrometer (UVVS) measurements obtained during three planetary flybys by the MErcury Surface, Space ENvironment, GEochemistry, and Ranging (MESSENGER) spacecraft [1-3]. The measurements detailed the distribution of two previously known metallic constituents of Mercury's exosphere, Na and Ca, and indicated the presence in the gas phase of yet another metallic species, Mg. Such measurements can answer fundamental scientific questions regarding the relative importance of possible source and loss processes for exospheric species ejected from a surface boundary [4]. The trajectory of MESSENGER during the last of its three flybys provided the best spatial coverage prior to orbit insertion. The measurements by MESSENGER of Na, Ca, and Mg during the third flyby have been analyzed with a novel tomographic method. This approach maximizes the amount of information that can be extracted from line-of-sight measurements because it yields three-dimensional distributions of neutrals consistent with the data. |
| NASA分類 | Space Sciences (General) |
| レポートNO | GSFC.ABS.5251.2011 |
| 権利 | Copyright, Distribution as joint owner in the copyright |
| URI | https://repository.exst.jaxa.jp/dspace/handle/a-is/245083 |
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