Air radiation in photographic meteor spectra

Astronomy and Astrophysics – Astronomy

Scientific paper

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Astronomical Photometry, Atmospheric Radiation, Meteoritic Composition, Spectral Energy Distribution, Spectrum Analysis, Atomic Excitations, Densitometers, Electron Energy, Line Spectra, Nitrogen, Oxygen, Radiative Transfer, Spectrophotometry, Vibrational Spectra

Scientific paper

Air radiation (N, O, N2) is present in major amounts in the spectra of three high-geocentric-velocity photographic meteor spectra. These spectra are high-definition spectra with over 50 identifiable features in each. These meteor spectra are compared with N2 radiation from a Geissler tube and with calculated N2 first-positive band intensities. An 'effective vibrational temperature' of about 20,000 K is obtained from the nitrogen first-positive band relative intensities. Electron excitation is indicated as the primary excitation process.

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