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Shear driven waves in the induced magnetosphere of Mars

Abstract : We present measurements of oscillations in the electron density, ion density and ion velocity in the induced magnetosphere of Mars. The fundamental frequency of the oscillations is a few millihertz, but higher harmonics are present in the spectrum. The oscillations are observed in a region where there is a velocity shear in the plasma flow. The fundamental frequency is in agreement with computational results from an ideal-MHD model. An interpretation based on velocity-shear instabilities is described.
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Contributor : Béatrice Pibaret-Bourdon Connect in order to contact the contributor
Submitted on : Wednesday, February 11, 2009 - 11:53:48 AM
Last modification on : Monday, July 4, 2022 - 10:23:47 AM

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H. Gunell, U. V. Amerstorfer, Hans Nilsson, Cyril Grima, M. Koepke, et al.. Shear driven waves in the induced magnetosphere of Mars. Plasma Physics and Controlled Fusion, IOP Publishing, 2008, 50 (7), pp.074018. ⟨10.1088/0741-3335/50/7/074018⟩. ⟨insu-00360495⟩



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