一个中层层幽灵的光谱学揭示了铁的排放
María Passas-Varo1, Oscar Van der Velde2, Francisco J Gordillo-Vázquez3
1Instituto de Astrofísica de Andalucía (IAA), CSIC, Glorieta de la Astronomía sn, 18008, Granada, Spain. passasv@iaa.csic.es.
Nature communications
|December 12, 2023
概括
被称为鬼魂的短暂发光事件表现出持续的绿色发光. 光谱分析显示,原子铁,,和氧离子有助于这种光,挑战了以前的假设.
科学领域:
- 大气的物理和化学.
- 航空学是航空学的.
- 太空物理空间物理学
背景情况:
- 中层层绿色排放来自Sprite Tops中的激发氧气 (鬼魂) 是在sprites上方观察到的微弱,短暂的发光事件.
- 激发原子氧的长寿命 (557.73 nm) 被假设为它们持续发光的原因.
- 之前对幽灵的光谱研究缺乏,导致导致的物种未被确定.
研究的目的:
- 以光谱分析幽灵排放的时间演变.
- 为了确定负责持续发光的特定原子和分子物种.
- 为了完善对空气等离子体运动在短暂的发光事件的理解.
主要方法:
- 进行了500nm和600nm之间的幽灵事件的光谱观测.
- 分析了辐射频谱的时间演变.
- 根据光谱线分析确定了贡献物种.
主要成果:
- 证实了兴奋原子氧的微弱痕迹.
- 确定了原子铁,原子,分子和离子分子氧为缓慢发光衰变的主要贡献者.
- 检测到原子和离子的痕迹,与流星金属密度一致.
结论:
- 幽灵的持续发光不仅仅是由于激发的原子氧气.
- 流星金属 (铁,,) 和其他大气物种在幽灵排放中发挥着重要作用.
- 目前的空气等离子体运动模型需要修订,以纳入这些发现的短暂的发光事件.
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