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Vibrational populations of near-ultraviolet O-2 band systems in the night airglow
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2012 (English)In: Canadian journal of physics (Print), ISSN 0008-4204, E-ISSN 1208-6045, Vol. 90, no 8, 741-751 p.Article in journal (Refereed) Published
Abstract [en]

Observations of the limb night airglow spectrum from 250 to 475 nm, emitted from the upper mesosphere and lower thermosphere, are compared with model spectra. Data from the Arizona GLO-1 imaging spectrograph and the OSIRIS spectrograph are combined to form the observed mean airglow spectrum; a tabulated version of this spectrum is included. Model spectra of the individual O-2 Herzberg I, II, and III, Chamberlain, and Slanger band systems are combined to simulate the observed mean spectrum. Franck-Condon relative band intensities are used to form a series of basis functions for the upper vibrational levels in each band system. These functions are fitted to the observed airglow spectrum with a least-squares method, the relative vibrational populations are derived and discussed.

Abstract [fr]

Résumé : Nous comparons les observations du spectre de la lueur nocturne en altitude de 250 à 475 nm, émis de lamésosphère supérieure et de la basse thermosphère, avec des spectres provenant de modèles. Nous combinons les donnéesdu spectrographe imageur GLO-1 de l’Arizona et du spectrographe de OSIRIS pour former un spectre observé moyende la lueur; nous incluons une tableau présentant ce spectre. Nous combinons les systèmes de bandes des spectresobtenus des modèles O2 Herzberg I, II et III, Chamberlain et Slanger pour simuler le spectre moyen observé. Lesintensités relatives de bande de Franck–Condon sont utilisées pour former une série de fonctions de base pour les niveauxvibrationnels supérieurs dans chaque système de bande. Ces fonctions sont ajustées par moindre carré au spectre observéde la lueur et nous en obtenons les populations vibrationnelles relatives et les analysons.

Place, publisher, year, edition, pages
2012. Vol. 90, no 8, 741-751 p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:su:diva-81546DOI: 10.1139/p2012-010ISI: 000307881700006OAI: oai:DiVA.org:su-81546DiVA: diva2:564101
Note

AuthorCount:6;

Available from: 2012-11-01 Created: 2012-10-25 Last updated: 2017-12-07Bibliographically approved

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Stegman, Jacek
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