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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 …
Extent of the Magnetotail of Venus From the Solar Orbiter, Parker Solar Probe and BepiColombo Flybys
Sorriso-Valvo, Luca; Edberg, Niklas J. T.; Persson, Moa +20 more
We analyze data from multiple flybys by the Solar Orbiter, BepiColombo, and Parker Solar Probe (PSP) missions to study the interaction between Venus' plasma environment and the solar wind forming the induced magnetosphere. Through examination of magnetic field and plasma density signatures we characterize the spatial extent and dynamics of Venus' …
The Dynamic Venusian Bow Shock Model With the Nonlinear Effect of Magnetosonic Mach Number Based on Venus Express Observations
Xu, Qi; Zhang, Tielong; Zuo, Pingbing +8 more
Utilizing the 8.5-year Venus Express observations, we investigate the effects of solar wind magnetosonic Mach number MMS $\left({M}_{MS}\right)$, solar extreme ultraviolet (EUV) radiation, solar wind dynamic pressure Pd $\left({P}_{d}\right)$ and interplanetary magnetic field (IMF) on the shape of the Venusian bow shock. Our statistical analysis y…
SHARP Shock Database
Russell, C. T.; Graham, D. B.; Vink, J. +8 more
Despite more than half a century of Collisionless shock (CS) research, our understanding of the processes of the shock energy dissipation into the charge particle heating and acceleration remains incomplete. To help to address the problem of the rate of the data analysis on CSs being well below of the rate of the data acquisition, an open-source h…
Statistical Mapping of Magnetic Topology at Venus
Persson, Moa; Xu, Shaosui; Frahm, Rudy A. +3 more
Despite Venus having insignificant intrinsic magnetic fields, the magnetic connectivity between the solar wind and the Venus ionosphere, or magnetic topology, is not as simple as expected and is also important for characterizing the Venus space environment. This study provides a technique combining superthermal electron energy and pitch angle dist…
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…
An Explanation of the Nightside Ionospheric Structure of Venus
Brecht, Stephen H.; Ledvina, Stephen A.
Hybrid simulations of Venus have produced nightside structure. It is believed these are the first simulations to produce the structure reported by spacecraft such as the Pioneer Venus Orbiter (PVO). The simulations reveal that the structure is created by the ▽Pe ambipolar electric field when it aligns with local IMF (interplanetary magn…
In Situ Observations of the Ion Diffusion Region in the Venusian Magnetotail
Barabash, S.; Futaana, Y.; Wei, Y. +8 more
Utilizing the in situ observations of the Analyzer of Space Plasmas and Energetic Atoms (ASPERA 4) and the magnetometer (MAG) onboard Venus Express, we report evidence of crossing the ion diffusion region of magnetic reconnection. Evidence of magnetic reconnection is based on two cases recorded by Venus Express in the Venusian magnetotail. In both…