First observations of long‐lived meteor trains with resonance lidar and other optical instruments
First observations of long‐lived meteor trains with resonance lidar and other optical instruments
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使用共振激光雷达和其他光学仪器首次观测长寿命流星列车
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
J. Engelman
中科院分区：
文献类型：
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作者：
M. Kelley;C. Gardner;J. Drummond;T. Armstrong;A. Liu;X. Chu;G. Papen;C. Kruschwitz;P. Loughmiller;B. W. Grime;J. Engelman
1998年11月，地球经历了彗星物质的最大值，这是每年狮子座流星雨的原因。这次流星雨事件在新墨西哥州上空产生了许多长寿命的夜光痕迹--肉眼可见--那里是一次主要的观测活动的中心。其中一条轨迹用一个装有窄钠滤光片的CCD摄像机检测了一个多小时，还有许多其他的轨迹被观察了十多分钟。这是第一次，在钠光成像的同时，测量了这种轨迹中的钠密度。我们已经证实了长寿命光发射的一个来源-涉及臭氧的钠催化反应-但它太弱了，无法解释这种踪迹的可见性。此外，我们提出了一个新的解释，长期以来报道的圆柱形壳外观的荧光轨迹，并表明，臭氧消耗的化学过程是一个可能的解释这种现象。
In November 1998 the earth passed through a maximum in the cometary material responsible for the yearly Leonids meteor shower. The meteor storm event produced numerous examples of long‐lived chemiluminescent trails—visible to the naked eye—over New Mexico, where a major observation campaign was centered. One trail was detected for over an hour with a CCD camera employing a narrow sodium filter, and many others were observed for over ten minutes each. For the first time, sodium densities in such trails were measured while also being imaged in sodium light. We have verified one source of long‐lived light emissions—a sodium‐catalyzed reaction involving ozone—but it is far too weak to explain the visibility of such trails. In addition, we present a new explanation for the cylindrical shell appearance long reported for chemiluminescent trails and show that ozone depletion by chemical processes is a possible explanation for this phenomenon.