エンケラドスの南極地形からのカーテン噴火
Joseph N Spitale1, Terry A Hurford2, Alyssa R Rhoden3
1Planetary Science Institute, 1700 East Fort Lowell Road, Suite 106, Tucson, Arizona 85719, USA.
Nature
|May 8, 2015
まとめ
エンケラドス (Enceladus) とは
科学分野:
- 惑星科学は惑星科学である.
- 天体生物学 アストロバイオロジー
- 地質物理学 地質物理学とは地質物理学です.
背景:
- エンケラドスの南極の地形は",タイガーストライプ"として知られる顕著な断層を特徴としています.
- これらのトラのストライプは,水蒸気と氷の粒子の羽根の確認された源です.
- 以前の研究では,これらの裂け目から発生するより高い温度と離散ジェットが示されました.
研究 の 目的:
- エンケラドスの南極における噴火活動の性質を再評価する.
- 羽ばたき放射の空間的および時間的な分布を特徴づけるために.
- エンケラドスの冷凍火山現象を説明する理論のための正確なデータを提供するため.
主な方法:
- タイガーストライプの高解像度画像データの分析.
- 噴射活動をマッピングするための三角測量技術.
- 1年 (2009年 - 2010年) の間 (2009年 - 2010年) の断裂に沿った総排出量のマッピング.
主要な成果:
- 観測された噴火活動の多くは,分離したジェットではなく,広範囲でカーテン状の噴火から発生しています.
- 目に見える離散ジェットは,おそらく,視角と断裂幾何学によって引き起こされる光学錯覚です.
- 地図は,タイガーストライプに沿った総排出パターンを,複数の時間点で示しています.
結論:
- エンケラドスの南極の噴火様式は,主にカーテン状である.
- 離散ジェットの以前の観測を再解釈することは必要である.
- 真の放射様式を理解することは,エンケラドスの羽根形成理論にとって不可欠です.
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