auroral line

auroral line

[ə′rȯr·əl ‚līn]
(spectroscopy)
A prominent green line in the spectrum of the aurora at a wavelength of 5577 angstroms, resulting from a certain forbidden transition of oxygen.
References in periodicals archive ?
Our atmosphere contributes airglow and auroral lines due to oxygen (at 5577 and 6300 angstroms), sodium (5893), and weak lines of nitrogen.