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Force Analysis of Venus's Induced Magnetosphere: A Multifluid Hall–Magnetohydrodynamics Study
Cao, Jinbin; Ge, Yasong; Lu, Haoyu +8 more
Understanding which processes control atmospheric escape and the loss of water from planetary environments is crucial. The ESA's Venus Express spacecraft has observed a significant depletion in Venus's upper atmosphere, driven by the solar wind. In such scenarios, the electromagnetic force can accelerate planetary ions to energies that allow them …
Variations in Venusian magnetic topology during an interplanetary coronal mass ejection passage: A multifluid magnetohydrodynamics study
Cao, Jinbin; Mazelle, Christian; Ge, Yasong +7 more
The global effects on Venusian magnetic topology and ion escape during the significant solar-wind disturbances caused by the interplanetary coronal mass ejection (ICME) remain an open area of research. This study examined a particularly intense ICME interaction with Venus on November 5, 2011, using a global multifluid magnetohydrodynamics (MHD) mo…
Night O2 (a1Δg) airglow spatial distribution and temporal behavior on Venus based on SPICAV IR/VEx nadir dataset
Montmessin, F.; Fedorova, A.; Korablev, O. +6 more
The infrared O2 (a1Δg) airglow driven by the subsolar to antisolar circulation occurs between two global circulation regimes on Venus: the zonal super-rotation below 90 km and the subsolar to antisolar circulation over 120 km. Here we report the complete global results of SPICAV IR/Venus Express observations of O
Similarities and Differences between ICME-driven Shocks Observed by VEX (∼0.72 au) and WIND (∼1.0 au)
Xu, Qi; Feng, Xueshang; Shen, Zhenning +7 more
The features of interplanetary shocks driven by interplanetary coronal mass ejections (ICMEs) observed by WIND (∼1.0 au) and Venus Express (VEX; ∼0.72 au) during the same period are statistically analyzed by comparing their similarities and differences. It is found that the proportion of ICME-driven shocks in all shocks decreases slightly from ∼0.…
Venus' O 5577 Å Oxygen Green Line: A Global Diffuse Proton-Induced Aurora
Tellmann, Silvia; Pätzold, Martin; Peter, Kerstin +5 more
The Venusian O(1S–1D) 5577 Å "oxygen green line" has been an enigmatic feature of the Venusian atmosphere since its first attempted observation by the Venera spacecraft. Its first detection in 1999 and subsequent detections point to a unique auroral phenomena. However, the lack of (1D–3P) 6300 Å "oxygen …
The variability of the topside ionospheres of Venus and Mars as seen by recent radio science observations
Fränz, Markus; Tellmann, Silvia; Pätzold, Martin +7 more
This study combines the observations of the Venus Express Venus Radio science experiment (VeRa), Mars Express Mars Radio Science experiment (MaRS), and MAVEN Radio Occultation Science Experiment (ROSE) at Venus and Mars with proxies for environmental parameters, insolation and solar wind characteristics to compare the effects of individual drivers…
Wave Mode Occurrence Distribution Around Venus: A VEX Statistical Study
Fraenz, Markus; Echer, Ezequiel; Marques de Souza Franco, Adriane +3 more
In this work, plasma and magnetic field data from Venus Express (VEX) were analyzed through the entire mission span (2006-2014) in order to statistically study wave mode occurrence around Venus considering different solar wind conditions. The wave mode occurrence distribution in terms of solar activity (maxima and minimum periods), solar wind pres…