Solar wind density and velocity control of auroral brightness under normal interplanetary magnetic field conditions

Details Solar wind density and velocity control of auroral brightness under normal interplanetary magnetic field conditions Solar wind density and velocity control of auroral brightness under normal interplanetary magnetic field conditions

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jgra..107.1428s&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 107, Issue A12, pp. SMP 9-1, CiteID 1428, DOI 10.1029/2001JA009138

Physics

6

Ionosphere: Auroral Ionosphere (2704), Ionosphere: Particle Precipitation, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions

Scientific paper

In this study we determine relationships between auroral brightness and each of the solar wind density and velocity under normal interplanetary magnetic field (IMF) conditions using Polar Lyman-Birge-Hopfield long band (~170.0 nm) images and Interplanetary Monitoring Platform 8 solar wind data. Since IMF and season are parameters that can affect the auroral brightness, the determination of the relationships is performed on the basis of the IMF Bz polarity and season to reduce some contamination from these two parameters. It is found that for southward IMF and the winter case the solar wind density and velocity increase the auroral brightness mainly on the nightside. For southward IMF and the summer case the density and velocity also increase the auroral brightness mainly on the nightside, but the increase is not as large as that for southward IMF and the winter case.

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