Behavior of ionized plasma in the high latitude topside ionosphere - The polar wind

Mathematics

Scientific paper

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Hydrogen Atoms, Oxygen Ions, Polar Regions, Solar Wind, Space Plasmas, Anisotropy, Electron Energy, Mathematical Models, Steady State, Temperature, Wind Profiles

Scientific paper

A numerical model is used to investigate the steady-state behavior of a fully ionized plasma encompassing the geomagnetic field lines from 1500 km to 10 earth radii, and solutions of the 16 moment system of transport equations for the polar wind are obtained. For the present cases studied, results of the 13 and 16 moment simulations are found to be similar, although the temperature anisotropy is quite high. Polar wind studies reveal an electron temperature anisotropy developing around 2500 km, with the collisions keeping the electron temperature isotropic below 2500 km. Good agreement is found between the present polar wind simulations and recent observations.

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