Abstract
The presence of ‘contaminant’ heavy ions of planetary origin in the solar wind has long been the subject of intense theoretical and experimental research. Studies of their abundance, acceleration, and direction of motion are important because of their implications on the composition and dynamics of planetary and cometary plasma wakes. The plasma and magnetic field observations made with the Pioneer Venus Orbiter (PVO) at Venus have provided the opportunity to examine the conditions in which planetary ions are picked up by the solar wind. We show here that in the outer regions of the venusian far wake the displacement of planetary O+ particles, characteristic of the Venus upper ionosphere, does not occur necessarily along the magnetic field lines but approximately in the direction of the shocked solar wind.
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Pérez-de-Tejada, H., Intriligator, D. & Russell, C. Orientation of planetary O+ fluxes and magnetic field lines in the Venus wake. Nature 299, 325–326 (1982). https://doi.org/10.1038/299325a0
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DOI: https://doi.org/10.1038/299325a0
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