ネプチューン系の赤外線観測

B Conrath, F M Flasar, R Hanel

Science (New York, N.Y.)

|December 15, 1989

まとめ

旅行者2号は,ボイジャー2号である.

科学分野:

惑星科学は惑星科学である.
大気物理学大気物理学
スペクトロスコーピーは,スペクトロスコーピーを用います.

背景:

ネプテュンの大気組成と熱的構造は,以前は十分に特徴づけられていなかった.
海王星の気候を理解することは,太陽系外部の比較惑星学にとって極めて重要です.

研究の目的:

ネプテュンの熱放出と反射太陽放射線スペクトルを分析するために.
大気温プロファイルとマップを導き出すために.
海王星の大気動力学と組成を調査する.

主な方法:

波長分析のために,ボイジャー2号の赤外線干渉計スペクトロメーターを使用した.
ブロードバンド放射計を用いて,可視光線と近赤外線を測定した.
分析されたアセチレン (C2H2) 排出特性と,30~1000ミリバーの温度プロファイルが得られた.

主要な成果:

ネプテュンのアセチレンモール分数は,推定9×10−8と9×10−7の間で推定されている.
温度の地図が作成され,より暖かい極と赤道が,より冷たい中緯度で,天王星と似ています.
高さと共に風速の一般的な衰退を観察し,波のような熱構造を特定し,そのいくつかはグレート・ダーク・スポットと関連している.

結論:

海王星の大気温分布は,惑星の特徴が異なるにもかかわらず,天王星と類似しています.
風切れや熱波を含む大気動態が特徴づけられました.
ネプテュンの予備有効気温は59.3Kと推定され,トリトンの表面温度は38Kと推定されています.

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