まとめ
水星は,主にヘリウムで構成された薄い大気を持ち,表面圧力は極めて低い. マリナー10号のデータは,水星の表面アルベドと月の表面アルベドの類似点も明らかにした.
科学分野:
- 惑星科学 惑星科学
- 大気科学 大気科学
- スペクトル顕微鏡検査です.
背景:
- 最も内側にある惑星である水星は,太陽の近くにあるため,大気はほとんど理解されていない.
- 以前のミッションは,水星の大気組成と気圧に関する限られたデータを提供した.
研究 の 目的:
- マリナー10号の紫外線実験から得られたデータを分析し,水星の大気の特徴を明らかにした.
- 水星の表面の組成,圧力,アルベドを決定する.
- 水星の後ろで検出された説明できない信号を調査するために.
主な方法:
- マリナー10号の観測データによる紫外線スペクトル分析.
- 大気圧の測定とガスの豊富さ.
- 表面アルベドの測定は,様々な波長で行われます.
主要な成果:
- 水星の大気は薄く,ヘリウムが重要な成分である.
- ターミネーターのヘリウム部分圧は,約5×10~12ミリバーです.
- 表面の大気圧の総量は2×10~9ミリバー未満である.
- 水素,酸素,炭素,アルゴン,ネオン,クセノンの上限が定められた.
- 水星の表面アルベドは,月 (500-1600アングストーム) と似た波長依存を示している.
- 説明がつかない強い信号は,水星の後ろのエアグローインスツルメントによって検出されました.
結論:
- 水星の薄い大気はヘリウムによって支配されています.
- 表面アルベドの特徴は,惑星の表面の組成に関する洞察を提供します.
- 観測された空気光信号とその局所性プラズマ特性への影響を説明するために,さらなる調査が必要である.
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