的热辐射来自利略的光极极度计-辐射计
J R Spencer1, J A Rathbun, L D Travis
1Lowell Observatory, 1400 West Mars Hill Road, Flagstaff, AZ 86001, USA.
概括
利略 利略 利略 利略
科学领域:
- 行星科学 行星科学
- 火山学 火山学是一门学科.
- 遥感 遥感 遥感 遥感
背景情况:
- 木星的卫星Io是太阳系中火山活动最活跃的行星.
- 了解Io的热排放是理解其火山过程和内部热量的关键.
- 之前的观测为Io的热景观提供了有限的空间分辨率.
研究的目的:
- 绘制和分析Io的热辐射,使用来自利略的光极极度计-辐射计的数据.
- 为了研究Io表面的温度变化,特别是像洛基帕特拉这样的火山热点.
- 从Io的夜间热映射估计全球热流.
主要方法:
- 在I24,I25和I27飞越期间利用了利略航天器的光极极度计-辐射计仪器.
- 绘制了Io的热辐射,空间分辨率从2.2公里到300公里不等.
- 分析温度数据以确定火山活动,浮出水面事件和全球热量分布.
主要成果:
- 在Loki Patera的大部分地区观察到均的温度,在西南部局部高温,表明最近爆发.
- 发现洛基帕特拉的很大一部分在I24和I27飞越之间重新浮出水面.
- 在佩雷火山地底记录了低温 (160 K) 和高温 (高达 200 K) 在Pillan和Zamama的流量.
- 创建了夜间温度的全球地图.
结论:
- 利略的高分辨率热绘图显示了Io的动态火山活动和重新浮出水面.
- 夜间温度地图对于估计Io的全球热流是非常有效的.
- 这项研究为控制Io极端火山活动的热过程提供了关键的见解.
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