The excitation of ionic lines and molecular bands in meteor wakes |
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Authors: | LMG Poole |
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Institution: | Department of Physics, University of Sheffield, Sheffield S3 7RH, England |
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Abstract: | The appearance of multiplets arising from the 42P state of CaII (the H and K lines and an infrared triplet), the 1st positive band of N2 and possibly certain multiplets of FeII in meteor wake spectra is explained semi-quantitatively in terms of the two-step sequence: collisional ionization of major atmospheric species O2 and N2 followed by resonant charge exchange with ablated meteoric atoms. Many other features which could arise through this mechanism (multiplets of MgII, SiII and FeII, and bands of O2 and N2) are likely to be weak or to have escaped detection owing to observational selection. |
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