The current-voltage relationship in auroral current sheets

Details The current-voltage relationship in auroral current sheets The current-voltage relationship in auroral current sheets

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987jgr....92..187w&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 92, Jan. 1, 1987, p. 187-194. Previously announced in STAR as N87-13028.

Physics

53

Auroras, Current Sheets, Earth Ionosphere, Electric Fields, Volt-Ampere Characteristics, Amplitudes, Bearing (Direction), High Resolution, Linearity, Size (Dimensions), Vertical Orientation

Scientific paper

The current-voltage relation within narrow auroral current sheets is examined through the use of high-resolution data from the high altitude Dynamics Explorer 1 satellite. The north-south perpendicular electric field and the east-west magnetic field are shown for three cases in which there are large amplitude, oppositely directed paired electric fields and narrow current sheets. These data are shown to indicate that there is a linear Ohm's law relationship between the current density and the parallel potential drop within the narrow current sheets. This linear relationship had previously been verified for large-scale auroral formations greater than 20 km wide at the ionosphere. The evidence shown here extends our knowledge down to the scale size of discrete auroral arcs.

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