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  • 1
    Electronic Resource
    Electronic Resource
    Observations of Leonid Meteors Using a Mid-Wave Infrared Imaging Spectrograph (1998)
    Springer
    Earth, moon and planets 82-83 (1998), S. 81-92 
    Details
    ISSN: 1573-0794
    Keywords: Ablation ; Leonids 1998 ; meteors ; meteoroids ; mid-IR emission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract We report broadband 3–5.5 µm detections of two Leonid meteors observed during the 1998 Leonid Multi-Instrument Aircraft Campaign. Each meteor was detected at only one position along their trajectory just prior to the point of maximum light emission. We describe the particular aspects of the Aerospace Corp. Mid-wave Infra-Red Imaging Spectrograph (MIRIS) developed for the observation of short duration transient events that impact its ability to detect Leonid meteors. This instrument had its first deployment during the 1998 Leonid MAC. We infer from our observations that the mid-wave IR light curves of two Leonid meteors differed from the visible light curve. At the points of detection, the infrared emission in the MIRIS passband was 25 ± 4 times that at optical wavelengths for both meteors. In addition, we find an upper limit of 800 K for the solid body temperature of the brighter meteor we observed, at the point in the trajectory where we made our mid-wave IR detection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017026032709
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Mid-Infrared Spectroscopy of Persistent Leonid Trains (1998)
    Springer
    Earth, moon and planets 82-83 (1998), S. 439-456 
    Details
    ISSN: 1573-0794
    Keywords: Meteors ; meteoroids ; mid-IR spectroscopy ; persistent trains
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The first infrared spectroscopy in the 3–13 micron region has been obtained of several persistent Leonid meteor trains with two different instrument types, one at a desert ground-based site and the other on-board a high-flying aircraft. The spectra exhibit common structures assigned to enhanced emissions of warm CH4, CO2, CO and H2O, which may originate from heated trace air compounds or materials created in the wake of the meteor. This is the first time that any of these molecules has been observed in the spectra of persistent 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 after the meteor itself has passed by. Continuum emission is observed also, but its origin has not yet been established. No 10 micron dust emission feature has been observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1017083811695
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    Paper (German National Licenses)
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  • 3
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    Mid-Infrared Spectroscopy of Persistent Leonid Trains (2000)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: The first infrared spectroscopy in the 3-13 micron region has been obtained of several persistent Leonid meteor trains with two different instrument types, one at a desert ground-based site and the other on-board a high-flying aircraft. The spectra exhibit common structures assigned to enhanced emissions of warm CH4, CO2, CO and H2O which may originate from heated trace air compounds or materials created in the wake of the meteor. This is the first time that any of these molecules has been observed in the spectra of persistent 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 after the meteor itself has passed by. Continuum emission is observed also, but its origin has not yet been established. No 10 micron dust emission feature has been observed.
    Keywords: Astrophysics
    Format: application/pdf
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