由LICIACube发现的Dimorphos喷射羽毛的特性
E Dotto1, J D P Deshapriya2, I Gai3
1Osservatorio Astronomico di Roma, INAF, Rome, Italy. elisabetta.dotto@inaf.it.
Nature
|February 28, 2024
概括
双重小行星重定向测试 (DART) 任务成功撞击了Dimorphos,产生了大型喷射羽毛. 在LICIACube的数据中,
科学领域:
- 星球科学
- 天体物理学
- 太空任务操作
背景情况:
- 双重小行星转向测试 (DART) 任务旨在测试小行星转向技术.
- 在2022年9月26日,Didymos的卫星Dimorphos成为DART撞击的目标.
- 之前的观测显示了撞击后的显著亮度和喷射量.
研究的目的:
- 分析DART对Dimorphos产生的喷射羽毛的详细特征.
- 提供高分辨率,近距离观测小行星撞击的直接后果.
- 了解小行星弹射的动态和组成,
主要方法:
- 使用LICIACube卫星上的LUKE和LEIA仪器进行观测.
- 从撞击前71秒到撞击后320秒收集的数据.
- 分析了喷射的形态,颜色和速度.
主要成果:
- 喷射的风形成了一个140度的光圈角.
- 的颜色呈现出一个渐变的色调,
- 喷射速度从每秒十到大约500米,具有复杂,不均的结构,包括细丝和巨石.
结论:
- 达尔特撞击产生了大量复杂的喷射羽毛,
- LICIACube提供了前所未有的近距离数据,
- 这些发现有助于理解撞击过程和改进行星防御策略.
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