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The Response of the Venusian Plasma Environment to the Passage of an ICME: Hybrid Simulation Results and Venus Express Observations
Coates, A. J.; Kallio, E.; Futaana, Y. +6 more
Owing to the heritage of previous missions such as the Pioneer Venus Orbiter and Venus Express, the typical global plasma environment of Venus is relatively well understood. On the other hand, this is not true for more extreme driving conditions such as during passages of interplanetary coronal mass ejections (ICMEs). One of the outstanding questi…
Magnetic Fluctuations and Turbulence in the Venusian Magnetosheath Downstream of Different Types of Bow Shock
Zhang, T. L.; Vörös, Z.; Xiao, S. D.
We statistically examine the characteristic scaling features of fluctuations in the dayside Venusian magnetosheath downstream of different types, quasi-parallel (Q∥) and quasi-perpendicular (Q⊥), of bow shock based on Venus Express data. We found that magnetic fluctuations have different characteristic scaling features downst…
The Quasi-monochromatic ULF Wave Boundary in the Venusian Foreshock: Venus Express Observations
Zhang, Tielong; Mazelle, Christian; Lu, Quanming +5 more
The location of ultralow-frequency (ULF) quasi-monochromatic wave onset upstream of Venus bow shock is explored using Venus Express magnetic field data. We report the existence of a spatial foreshock boundary behind which ULF waves are present. We have found that the ULF wave boundary at Venus is sensitive to the interplanetary magnetic field (IMF…
A Statistical Study of Ionospheric Boundary Wave Formation at Venus
Zhang, Tielong; Futaana, Yoshifumi; Frahm, Rudy A. +3 more
Previous missions to Venus have revealed that encounters with plasma irregularities of atmospheric origin outside the atmosphere are not uncommon. A number of mechanisms have been proposed to discuss their origins as well as their roles in the atmospheric evolution of Venus. One such mechanism involves an ionopause with a wavelike appearance. By u…
The Largest Electron Differential Energy Flux Observed at Mars by the Mars Express Spacecraft, 2004-2016
Coates, A. J.; Barabash, S.; Holmström, M. +3 more
The goal of this paper is to understand the processes by which solar wind electrons are energized in the Martian magnetosphere and how this compares to processes at Venus and Earth. Each is unique in the source of its magnetic field topology and how this influences electron energization. To achieve this goal, 24 million spectra spanning 13 years h…