Computer Science
Scientific paper
Nov 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sunge...6...31s&link_type=abstract
Sun and Geosphere, vol.6, no.1, p.31-35.
Computer Science
Scientific paper
Bow shock is a powerful transformer of the solar wind kinetic energy into the gas dynamic and electromagnetic energy. Indeed, the magnetic field tangential component and magnetic energy density increase by factors of almost 4 and approximately 15, respectively, at the bow point when the front is crossed. A jump of the magnetic field tangential component at front crossing means that the front carries an electric current. The solar wind kinetic energy partly transforms to gas kinetic and electromagnetic energy when passage through the bow shock front. The transition layer (magnetosheath) can use the part of this energy for accelerating of plasma, but can conversely spend the part its kinetic energy on the electric power generation, which afterwards may be used by the magnetosphere. Thereby, transition layer can be both consumer and generator of electric power depending upon special conditions. The direction of current behind the bow shock front depends on the sign of the IMF Bz-component. It is this current which sets plasma convection in motion. Energetically, this external current is necessary for maintaining convection of plasma in the inhomogeneous system (magnetosphere). The generator at the bow shock front can be a sufficient source of power for supplying energy to substorm processes in the geomagnetosphere.
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