Electrostatic potentials in the downward auroral current region

Details Electrostatic potentials in the downward auroral current region Electrostatic potentials in the downward auroral current region

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jgra..11008207v&link_type=abstract

Journal of Geophysical Research, Volume 110, Issue A8, CiteID A08207

Physics

7

Magnetospheric Physics: Auroral Phenomena (2407), Magnetospheric Physics: Field-Aligned Currents And Current Systems (2409), Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Magnetosphere/Ionosphere Interactions (2431), Magnetospheric Physics: Numerical Modeling

Scientific paper

Assuming a fixed ion density, adiabatic electron motion, and quasi-neutrality, we use the stationary Vlasov equation to derive the self-consistent potential in an auroral flux tube that carries downward current. Our model predicts downward electric fields ~5 mV/m at an altitude near 2000 km, and around 4000 km the potential reaches ~2.5 kV. A weak upward electric field at high altitudes reduces the potential, and the potential difference between the ionosphere and magnetosphere is much smaller.

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