Physics
Scientific paper
Aug 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....9813545a&link_type=abstract
Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A8, p. 13,545-13,555.
Physics
8
Auroras, Electron Precipitation, Magnetic Field Configurations, Magnetosphere-Ionosphere Coupling, Satellite Imagery, Geomagnetism, Polar Regions, Topology, Ultraviolet Emission
Scientific paper
Viking UV images and in situ plasma measurements have been examined for cases where polar arcs could be quantitatively analyzed. A statistical analysis of the UV emissions in the vicinity of polar arcs has indicated that the regions on opposite sides of the arcs are consistently asymmetric, not occasionally asymmetric as previously reported in the literature. Simultaneous particle observations confirm the presence of precipitating electrons throughout the region of enhanced emission which have characteristics consistent with a closed field line source for the particles. Further, our results show for the first time that the extent of emission associated with these large-scale polar arcs extends hundreds of km poleward.
Austin J. B.
Murphree John S.
Woch Joachim
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