Investigation of oxygen O_2(a1 Delta g) emission on the nightside of Venus: Nadir data of the VIRTIS-M experiment of the Venus Express mission - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Cosmic Research / Kosmicheskie Issledovaniya Année : 2010

Investigation of oxygen O_2(a1 Delta g) emission on the nightside of Venus: Nadir data of the VIRTIS-M experiment of the Venus Express mission

Résumé

The paper is devoted to studies of the oxygen 1.27 mum emission on the Venus nightside using nadir measurements with the imaging spectrometer VIRTIS. A map of the emission distribution in coordinates latitude-local time is drawn for the southern hemisphere, equatorial region, and low latitudes of the northern hemisphere on the basis of observations in the period from June 2006 to January 2008 (more than 600 runs). As it has been noted before, strong spatial and time variations of the emission were observed. Two maxima of the emission are found: the first one (expected) is observed near the antisolar point, and the second one (near 23:00 LT) is seen at latitudes of 30°-60° in the southern hemisphere. The average value of the emission intensity measured according to the nadir data is 1.0 ± 0.4 MR. The emission with the intensity exceeding the average one by a factor of 2-3 was detected at different times almost over the entire nightside of the southern hemisphere.

Dates et versions

hal-03729568 , version 1 (20-07-2022)

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Citer

Alexey V. Shakun, Ludmilla Zasova, Giuseppe Piccioni, Pierre Drossart, Alessandra Migliorini. Investigation of oxygen O_2(a1 Delta g) emission on the nightside of Venus: Nadir data of the VIRTIS-M experiment of the Venus Express mission. Cosmic Research / Kosmicheskie Issledovaniya, 2010, 48, pp.232-239. ⟨10.1134/S0010952510030044⟩. ⟨hal-03729568⟩
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