On the formation of auroral arcs and acceleration of auroral electrons

Details On the formation of auroral arcs and acceleration of auroral electrons On the formation of auroral arcs and acceleration of auroral electrons

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975jgr....80.2096s&link_type=abstract

Journal of Geophysical Research, vol. 80, June 1, 1975, p. 2096-2108.

Physics

58

Auroral Arcs, Electron Precipitation, Ionospheric Currents, Magnetospheric Instability, Plasma-Particle Interactions, Electrostatic Waves, Oblique Shock Waves, Particle Acceleration, Shock Wave Profiles

Scientific paper

A mechanism is proposed according to which the highly structured auroral arc is caused by a current-driven laminar electrostatic shock oblique to the geomagnetic field so that electrons are accelerated by the potential jump associated with the shock. The shock is assumed to be confined to a plane and is supported by a current flow with the energy coming from the voltage and current supplied by an external source. The oblique shock model is discussed along with laminar shock models. The small amplitude instabilities associated with the shock solutions are identified and the necessary conditions for wave growth are set forth. The proposed theory is discussed in the context of the magnetosphere.

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