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H⁺/O⁺ Escape Rate Ratio in the Venus Magnetotail and its Dependence on the Solar Cycle

Fedorov, A.; Barabash, S.; Futaana, Y. +3 more

A fundamental question for the atmospheric evolution of Venus is how much water-related material escapes from Venus to space. In this study, we calculate the nonthermal escape of H⁺ and O⁺ ions through the Venusian magnetotail and its dependence on the solar cycle. We separate 8 years of data obtained from the ion mass analyz…

Circulation of Venusian Atmosphere at 90-110 km Based on Apparent Motions of the O₂ 1.27 µm Nightglow From VIRTIS-M (Venus Express) Data

Piccioni, G.; Zasova, L. V.; Khatuntsev, I. V. +2 more

The paper is devoted to the investigation of Venus mesosphere circulation at 90-110 km altitudes, where tracking of the O₂(a¹Δ_g) 1.27 µm nightglow is practically the only method of studying the circulation. The images of the nightglow were obtained by VIRTIS-M on Venus Express over the course of more than 2 y…