期刊
ASTRONOMY & ASTROPHYSICS
卷 610, 期 -, 页码 -出版社
EDP SCIENCES S A
DOI: 10.1051/0004-6361/201629950
关键词
astrochemistry; techniques: spectroscopic; meteorites, meteors, meteoroids; plasmas
资金
- Grant Agency of the Czech Republic [14-12010S, 18-27653S]
- Regions of the Czech Academy of Sciences [R200401521, R200401721]
- Institutes of the Czech Academy of Sciences [R200401521, R200401721]
- STS Missions programme within the COST Actions [CM1104, TD1308]
- J. Heyrovsky Institute of Physical Chemistry
- Simons Foundation
- Kavli Foundation
- RFBR [16-32-00034]
Aims. We aim to analyse real-time Perseid and Leonid meteor spectra using a novel calibration-free (CF) method, which is usually applied in the laboratory for laser-induced breakdown spectroscopic (LIBS) chemical analysis. Methods. Reference laser ablation spectra of specimens of chondritic meteorites were measured in situ simultaneously with a high-resolution laboratory echelle spectrograph and a spectral camera for meteor observation. Laboratory data were subsequently evaluated via the CF method and compared with real meteor emission spectra. Additionally, spectral features related to airglow plasma were compared with the spectra of laser-induced breakdown and electric discharge in the air. Results. We show that this method can be applied in the evaluation of meteor spectral data observed in real time. Specifically, CF analysis can be used to determine the chemical composition of meteor plasma, which, in the case of the Perseid and Leonid meteors analysed in this study, corresponds to that of the C-group of chondrites.
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