Some consequences of corotating magnetospheric convection

Physics

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Convective Flow, Earth Magnetosphere, Jupiter Atmosphere, Magnetohydrodynamic Flow, Space Plasmas, Angular Momentum, Asymptotic Methods, Pioneer Space Probes, Voyager Project

Scientific paper

A comparison is conducted of the expected signature of the inflow region of the proposed corotating convection pattern with relevant magnetic field and plasma flow observations made by Pioneers 10 and 11 and Voyagers 1 and 2 in the Jovian magnetosphere. A region of net plasma inflow would be characterized by superrotation and a negative radial current in the equatorial plane within a characteristic distance L. It is found that no value of L exists that is consistent with both plasma and magnetic field observations. Hence it is concluded that at the time of these flybys, such a simple large-scale convection pattern did not dominate the plasma transport in the outer magnetosphere, although the existence of such a pattern in the inner magnetosphere is not ruled out. A more detailed test is proposed to determine whether or not a superposition of corotating convection and radial diffusion is consistent with the observations.

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