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Hot flow anomalies at Venus

Coates, A. J.; Barabash, S.; Zhang, T. L. +8 more

We present a multi-instrument study of a hot flow anomaly (HFA) observed by the Venus Express spacecraft in the Venusian foreshock, on 22 March 2008, incorporating both Venus Express Magnetometer and Analyzer of Space Plasmas and Energetic Atoms (ASPERA) plasma observations. Centered on an interplanetary magnetic field discontinuity with inward co…

Short large-amplitude magnetic structures (SLAMS) at Venus

Coates, A. J.; Barabash, S.; Zhang, T. L. +5 more

We present the first observation of magnetic fluctuations consistent with short large-amplitude magnetic structures (SLAMS) in the foreshock of the planet Venus. Three monolithic magnetic field spikes were observed by the Venus Express on 11 April 2009. The structures were ∼1.5-11 s in duration, had magnetic compression ratios between ∼3 and 6, an…

Observations of quasi-perpendicular propagating electromagnetic waves near the ionopause current sheet of Venus

Luhmann, J. G.; Russell, C. T.; Wei, H. Y. +3 more

Due to the lack of an intrinsic magnetic field at Venus, the Venus ionosphere acts as the obstacle to the incoming solar wind flow. Induced currents flowing on the ionopause resist the penetration of the solar wind magnetic fields into the ionosphere. The Venus Express magnetometer occasionally observes plasma waves near the ionopause. These waves…