hydroxyl emission

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(Also known as Meinel bands.) Spectroscopic feature seen in the upper atmosphere; a form of chemiluminescence due to the formation of vibrationally excited hydroxyl radicals in the reaction of hydrogen atoms with ozone, ams2001glos-Hex01.
The origin of the emission was correctly identified by A. Meinel in the 1950s. The emission is a component of the airglow.
Meinel, A. B. 1950. OH emission bands in the spectrum of the night sky. Astrophys. J.. 111. 555–564.

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