UV video spectroscopy of Leonid fireballs and persistent trains
UV video spectroscopy of Leonid fireballs and persistent trains
复制标题
狮子座火球和持续流的紫外视频光谱
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
渡部 潤一
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文献类型：
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作者：
S. Abe;H. Yano;N. Ebizuka;T. Kasuga;M. Sugimoto;J. Watanabe;阿部 新助;矢野 創;昇 海老塚;春日 敏測;杉本 雅俊;渡部 潤一
彗星流星体被认为是在地球历史早期为地球提供有机化合物的最佳候选者之一。然而，直到最近才有观察证据支持这一假设。因此，我们使用配备了反射光栅的增强型高清电视摄像机对2001年狮子座流星雨进行了光谱观测，反射光栅覆盖了300-700 nm的波长范围。为了尽量减少300 nm附近空气消光的影响，观测是在高海拔地区进行的，即日本国家天文台的斯巴鲁望远镜夏威夷天文台(h=4,100米)和野山射电天文台(h=1,340米)。观测到了彗星流星体中羟基自由基的光谱特征。本文给出了首次从地面探测到的OH发射的结果，并讨论了所发现的OHA-X(0，0)带的来源。
Cometary meteoroids are considered as one of the best candidates to have supplied organic compounds to the Earth in the early stage of its history. However, there had been no observational evidence to support this hypothesis until recently. Thus we conducted spectroscopic observations of the 2001 Leonid meteor shower by using intensified HDTV cameras equipped with a reflective grating which covers 300-700 nm wavelength range. In order to minimize the effect of air extinction near 300 nm, the observations were performed at a high elevation, i.e., the Subaru Telescope Hawaii observatory (h=4,100 m) and Nobeyama Radio Observatory (h=1,340 m) of National Astronomical Observatory of Japan. Spectral features of hydroxyl radicals in the cometary meteoroids were clearly observed. In this paper, we show the first result of detection of OH emission from the ground and discuss on the origin of the discovered OH A-X (0,0) band.