Other
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005pimo.conf....7a&link_type=abstract
Proceedings of the International Meteor Conference, Varna, Bulgaria, 23-26 September, 2004, Eds.: Triglav-Čekada, M., Kac, J.; M
Other
3
Scientific paper
Spectra of persistent meteor trains were observed at wavelength between 300 and 930 nm. Two obtained train spectra during the 1998 and 2001 Leonid meteor showers are reported here. During the 1998 Leonids, one train was detected by a photographic camera with a spectrograph covering 370-640 nm region. On the other hand, during the 2001 Leonids, video observations were carried out using image intensified cameras in ultraviolet, visible and near infrared wavelengths. Temperatures in persistent trains have been measured by atmospheric O2 A(0,1) band at the wavelength near 864.5 nm. From a video spectrum obtained just 7 seconds after parent fireball's flare, a rotational temperature of 250 K at altitude of 88.0 km was estimated. I can say that the cooling time scale of train strongly depends on the initial mass of its fireball. Based on cooling constant calculated from our results, I estimated a temperature of app. 130 K as a final exothermic temperature at early stage of persistent trains.
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