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月球的重力场来自重力恢复和内部实验室 (GRAIL) 任务的重力场
Maria T Zuber1, David E Smith, Michael M Watkins
1Department of Earth, Atmospheric and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139-4307, USA. zuber@mit.edu
重力恢复和内部实验室 (GRAIL) 任务绘制了月球的重力场,揭示了详细的地质特征和地下结构. 这些数据突出了轰炸对月球地质和密度分布的影响.
科学领域:
- 月球地质学 月球地质学
- 星球科学 星球科学
- 地质物理学 地质物理学
背景情况:
- 以前的月球重力模型缺乏对微小尺度特征的分辨率.
- 了解月球的内部结构是行星进化的关键.
研究的目的:
- 为了构建一个高分辨率的月球引力场地图.
- 为了确定以前未解决的地质和地下特征.
- 为了调查撞击轰炸对行星天体的作用.
主要方法:
- 利用了来自GRAIL任务的航天器对航天器跟踪数据.
- 开发了一个月球引力场模型,以球体波度和420度的顺序.
主要成果:
- 解决了以前看不见的构造结构,火山地形,盆地环和石坑.
- 超过98%的80-300度的重力签名与地形有关.
- 识别了2%的签名,代表了微细的地下结构细节.
结论:
- GRAIL数据提供了前所未有的月球地质和地下层的细节.
- 在破碎的地中保持着火山口的浮雕,主导着月球的重力特征.
- 撞击轰炸在陆地行星密度异常的同质化中发挥着重要作用.
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