In:
Journal of Geophysical Research: Space Physics, American Geophysical Union (AGU), Vol. 105, No. A11 ( 2000-11), p. 25333-25344
Abstract:
We present a two‐dimensional numerical model for the formation of discrete auroral arcs. This model describes the evolution of shear Alfvén waves generated by a growing force near the equatorial plane, and the transition to electrostatic fields when the force becomes stationary. The parallel electric fields on auroral field lines may be regarded as shear Alfvén waves driven by a magnetospheric generator at zero frequency. In our collisionless model, precipitating auroral electrons are accelerated to an energy of 350 eV when the upward current is 3.1 μAm −2 . We also find that the electrostatic potential drop is proportional to the square of the current density.
Type of Medium:
Online Resource
ISSN:
0148-0227
DOI:
10.1029/2000JA900103
Language:
English
Publisher:
American Geophysical Union (AGU)
Publication Date:
2000
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