Astronomical Institute, Academy of Sciences
Astronomical Institute, Academy of Sciences
出版者
宇宙科学研究所
出版者（英）
Institute of Space and Astronautical Science
雑誌名
The Institute of Space and Astronautical Science report. S.P. : Proceedings of the 2002 International Science Symposium on the Leonid Meteor Storms
巻
15
ページ
165 - 173
発行年
2003-03
抄録（英）
We present image intensified video observations of spectra of persistent meteor trainsduring Leonids 2001. Three distinct phases of the train evolution were found. The first two phasesshow atonric line spectra but both spectra are different by the presence of lines of higher excitationin the second phase. We interpret the first phase, which lasts only few seconds, as a rapid coolingof gas under non-equilibrium conditions. The second phase, lasting tens of second, was found tobe driven by atomic recombinations. The third phase shows continuous spectrum which emergesabout 20 seconds after the train formation and persists for minutes. Several molecular species areprobably responsible for the luminosity but they could not be reliably identifled.
Three Phases in the Evolution of Leonid Meteor Trains
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