Main spectral features of meteors studied using a terawatt-class high-power laser

被引:15
作者
Ferus, M. [1 ]
Kubelik, P. [1 ,4 ]
Petera, L. [1 ,2 ]
Lenza, L. [1 ,3 ]
Koukal, J. [1 ,3 ]
Krivkova, A. [1 ,7 ]
Laitl, V. [1 ]
Knizek, A. [1 ,2 ]
Saeidfirozeh, H. [1 ]
Pastorek, A. [1 ,7 ]
Kalvoda, T. [1 ,2 ]
Juha, L. [4 ,5 ]
Dudzak, R. [4 ,5 ]
Civis, S. [1 ]
Chatzitheodoridis, E. [6 ]
Krus, M. [5 ]
机构
[1] Czech Acad Sci, J Heyrovsky Inst Phys Chem, Dolejskova 3, Prague 18223 8, Czech Republic
[2] Charles Univ Prague, Fac Sci, Dept Phys & Macromol Chem, Albertov 2030, Prague 12840 2, Czech Republic
[3] Valasske Mezirici Observ, Vsetinska 78, Valasske 75701, Mezirici, Czech Republic
[4] Czech Acad Sci, Inst Phys, Dept Radiat & Chem Phys, Slovance 1999-2, Prague 18221 8, Czech Republic
[5] Czech Acad Sci, Inst Plasma Phys, Slovankou 1782-3, Prague 18200 8, Czech Republic
[6] Natl Tech Univ Athens, Sch Min & Met Engn, 9 Heroon Polytech Str, Zografos 15780, Greece
[7] Czech Tech Univ, Jugoslavskych Partyzanu 1580-3, Prague 16000 6, Czech Republic
关键词
atomic data; meteorites; meteors; meteoroids; INDUCED BREAKDOWN SPECTROSCOPY; INDUCED DIELECTRIC-BREAKDOWN; HIGH-ENERGY CHEMISTRY; EMISSION-SPECTROSCOPY; FORMAMIDE; SIMULATION; ABLATION; NUCLEOBASES; MIXTURES; STREAM;
D O I
10.1051/0004-6361/201935816
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Context. Meteor spectra are commonly interpreted using data from databases and tables. Several studies have demonstrated very sophisticated calculations of elemental compositions of meteoroid bodies based on the computation of synthetic meteor spectra or on the spectral analysis of airglow plasma containing evaporated, atomized, and ionized meteoroid matter. However, considering accuracy, reliability of computations, lack of laboratory experimental data in this field, as well as the complicated physical structure of meteor plasma, such qualitative assignment or quantitative calculations are still extensively discussed in the scientific community. Even on the laboratory level, many studies have shown the high complexity of the acquisition and interpretation of the data that are recorded with techniques of emission spectroscopy that are in fashion and philosophy similar to the spectral analysis of meteor plasma, that is, detection and quantification of the elements that are ablated from complicated multicomponent matrices. Aims. The current study is focused on the application of terawatt-class laser-induced breakdown spectroscopy (TC-LIBS) of real samples of chondritic meteorites. We recorded emission spectra with high resolution and high precision that contain spectral lines that are typical for real meteoric spectra. Experimental data were compiled in a form that is convenient for the meteoric spectra interpretation and calibration. Methods. TC-LIBS was carried out by a high-power terawatt-class laser facility, the Prague Asterix Laser System (PALS). The spectra were simultaneously recorded by an echelle high-resolution spectrograph in the UV/VIS spectral ranges and by a low-resolution spectrograph that was used for real observation of meteor spectra. We also present calculated synthetic spectra based on data from the NIST atomic spectra database. Results. We assembled etalon qualitative tables of major meteoric spectral features that can be used both for the spectral wavelength calibration of low-resolution observational instruments and for the exact interpretation of meteor spectra. The data are compared with real meteor spectra.
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