We discuss the acceleration of oxygen ions near Mars based on Phobos-2 observations. The ASPERA plasma instrument measured energized oxygen both in the flanks of the Martian magnetosphere and in the central tail near the induced current sheet. We show that a relatively simple empirical model of the plasma flow around the planet can explain a large part of the observed acceleration. The model is constructed using ASPERA proton flow data together with the magnetic field observations of the MAGMA instrument. The oxygen ions are studied by test particle simulation in this model with remarkably good qualitative agreement with actual observations.
|Number of pages||10|
|Journal||Advances in Space Research|
|Publication status||Published - 1998|
|MoE publication type||A1 Journal article-refereed|