Physics
Scientific paper
Sep 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aipc..679..323l&link_type=abstract
SOLAR WIND TEN: Proceedings of the Tenth International Solar Wind Conference. AIP Conference Proceedings, Volume 679, pp. 323-3
Physics
1
Particle Emission, Solar Wind, Interplanetary Magnetic Fields, Photosphere, Solar Wind Plasma, Sources Of Solar Wind
Scientific paper
The Wang-Sheeley relationship relates the solar wind speed at the Earth to the divergence rate of open magnetic flux tubes in the solar corona. This relationship is based on a statistically significant correlation between the flux tube divergence parameter ``fs'' derived from a photospheric field-based potential field source surface model, and satellite observations of the solar wind speed. The fast solar wind emanates from regions of small magnetic divergence, while slow solar wind comes from regions of high magnetic divergence. Arge and Pizzo [2] improved the reliability of the method by relating the coronal flux tube expansion factor to the solar wind speed at the source surface instead of the satellite. We use a three-dimensional MHD model of the solar corona to further investigate the implications of the Wang-Sheeley relationship for solar wind acceleration. The results suggest what additional heating and momentum inputs may be necessary in an MHD model to obtain the observed relationship between flux tube divergence and solar wind speed.
Abbett William P.
Ledvina Stephen A.
Luhmann Janet G.
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