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Proton Temperature Anisotropies in the Venus Plasma Environment During Solar Minimum and Maximum

Zhang, Tielong; Stenberg Wieser, Gabriella; Futaana, Yoshifumi +4 more

The proton population in Venus' plasma environment is characterized during periods of solar minimum and maximum using data from a particle mass-energy spectrometer. Such characterizations at different levels of solar activity provides physical insight into solar-cycle-dependent plasma phenomena around the planet, for example mirror modes in the ma…

A 3D Physics-Based Particle Model of the Venus Oxygen Corona: Variations With Solar Activity

Combi, Michael R.; Tenishev, Valeriy; Shou, Yinsi +2 more

Due to Venus not having a substantial planetary magnetic field the fast-flowing solar wind plasma can propagate to regions close to the planet. Therefore, thermal atomic oxygen in the thermosphere, hot oxygen in the corona, and the resulting pickup oxygen ions are essential for determining the overall interaction of the planet with plasma of the a…

A Comparative Study of Magnetic Flux Ropes in the Nightside Induced Magnetosphere of Mars and Venus

Harada, Yuki; Huang, Zesen; Luhmann, Janet G. +4 more

We analyzed Mars Atmosphere and Volatile Evolution (MAVEN) and Venus Express (VEX) data of magnetic flux ropes observed in both Mars and Venus nightside induced magnetosphere, in order to understand their statistical characteristics and possible formation processes. We statistically identified 382 (286) events at Mars (Venus) via the minimum varia…