Criticism of reconnection models of the magnetosphere

Physics

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Earth Magnetosphere, Geomagnetic Tail, Interplanetary Magnetic Fields, Plasma Flux Measurement, Atmospheric Models, Auroral Arcs, Electric Fields, Field Theory (Physics), Heos Satellites, Magnetohydrodynamic Flow, Magnetopause

Scientific paper

Two phenomena which contradict reconnection models of the magnetosphere are discussed. While the model implies the dissipation of large amounts of energy by the magnetopause current, HEOS-2 satellite data reveal a plasma with decreased energy density and reduced flow. The other phenomenon involves the location of the boundary of closed magnetic field lines. In the reconnection process the plasma outflow would cut across open field lines toward higher latitudes and there should be a band of open field lines equatorward of the cleft. In contradiction, observations of trapped energetic particles indicate closed field lines within the entry layer and cleft. To account for some of the phenomena which support reconnection models, it is suggested that electric fields are parallel to the magnetic field lines somewhere on the dawn and dusk sides of the magnetosphere, with an equipotential dayside magnetopause.

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