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Вид документа : Статья из журнала Шифр издания :
Автор(ы) : Gunell H., Amerstorfer U. V., Nilsson H., Grima C., Koepke M., Franz M., Winningham J. D., Frahm R. A., Sauvaud J. A., Fedorov A., Erkaev N. V., Biernat H. K., Holmstrom M., Lundin R., Barabash S.
Заглавие : Shear driven waves in the induced magnetosphere of Mars
Место публикации : Plasma Phys. Control. Fusion: IOP PUBLISHING LTD, 2008. - Vol. 50, Is. 7. - Ст.74018. - ISSN 0741-3335, DOI 10.1088/0741-3335/50/7/074018 Примечания : Cited References: 27
Предметные рубрики: SOLAR-WIND INTERACTION KELVIN-HELMHOLTZ INSTABILITY MARTIAN ATMOSPHERE VELOCITY SHEAR VENUS PLASMA MHD IONOPAUSE SIMULATIONS BOUNDARY Ключевые слова (''Своб.индексиров.''): charged particles--magnetosphere--motion estimation--natural frequencies--plasma stability--shearing machines--p ,p ,t measurements--computational results--electron densities--fundamental frequency (ff)--higher harmonics--ion densities--ion velocities--velocity shear--electrons Аннотация: 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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