Mid-infrared spectroscopy of persistent Leonid trains

Citation
Rw. Russell et al., Mid-infrared spectroscopy of persistent Leonid trains, EARTH MOON, 82-3, 2000, pp. 439-456
Citations number
13
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Space Sciences
Journal title
EARTH MOON AND PLANETS
ISSN journal
0167-9295 → ACNP
Volume
82-3
Year of publication
2000
Pages
439 - 456
Database
ISI
SICI code
0167-9295(2000)82-3:<439:MSOPLT>2.0.ZU;2-7
Abstract
The first infrared spectroscopy in the 3-13 micron region has been obtained of several persistent Leonid meteor trains with two different instrument t ypes, one at a desert ground-based site and the other on-board a high-flyin g aircraft. The spectra exhibit common structures assigned to enhanced emis sions of warm CH4, CO2, CO and H2O, which may originate from heated trace a ir compounds or materials created in the wake of the meteor. This is the fi rst time that any of these molecules has been observed in the spectra of pe rsistent trains. Hence, the mid-IR observations offer a new perspective on the physical processes that occur in the path of the meteor at some time af ter the meteor itself has passed by. Continuum emission is observed also, b ut its origin has not yet been established. No 10 micron dust emission feat ure has been observed.