Discovery of the Atomic Oxygen Green Line in the Venus Night Airglow

Details Discovery of the Atomic Oxygen Green Line in the Venus Night Airglow Discovery of the Atomic Oxygen Green Line in the Venus Night Airglow

Jan 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001sci...291..463s&link_type=abstract

Science, Volume 291, Issue 5503, pp. 463-465 (2001).

Physics

27

Scientific paper

Green line emission at 557.7 nanometers arising from the O(1S - 1D) transition of atomic oxygen has been observed on the nightside of Venus with HIRES, the echelle spectrograph on the W. M. Keck I 10-meter telescope. We also observe optical emissions of molecular oxygen, consistent with the spectra from the Venera orbiters, but our green line intensity is so high that we cannot explain how it could be inconspicuous in the Venera spectra. An upper limit for the intensity of the O(1D - 3P) oxygen red line at 630 nanometers has also been obtained. The large green/red ratio indicates that the source is not associated with the Venus ionosphere. An important conclusion is that observation of the green line in a planetary atmosphere is not an indicator of an atmosphere rich in molecular oxygen.

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