Electrostatic potentials in the downward auroral current region
2005 (English)In: Journal of Geophysical Research, ISSN 0148-0227, Vol. 110, no A08207, 1-9 p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
Washington: American Geophysical Union , 2005. Vol. 110, no A08207, 1-9 p.
aurora, downward current, electrostatic, potential, electron density
IdentifiersURN: urn:nbn:se:umu:diva-2306DOI: doi:10.1029/2005JA011083OAI: oai:DiVA.org:umu-2306DiVA: diva2:140248