Other
Scientific paper
May 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005agusmsh13a..10p&link_type=abstract
American Geophysical Union, Spring Meeting 2005, abstract #SH13A-10
Other
2169 Sources Of The Solar Wind, 7509 Corona, 7511 Coronal Holes, 7524 Magnetic Fields
Scientific paper
Comparison of Photospheric Footpoints of Open Magnetic Field Regions using CSSS and PFSS models The Current--Sheet Source Surface (CSSS) model developed by Zhao and Hoeksema (1995) assumes a cusp surface at the cusp point of coronal streamers at around 2.5 Rsun, which divides the corona into three regions, one bounded by the photosphere and the cusp surface, the second, between the cusp surface and the source surface, and the third, the region beyond the source surface. In this model the source surface can be placed closer to the Alfven critical point which is a great advantage over the traditional Potential Field Source Surface (PFSS) models, where it is at 2.5 Rsun. The source surface magnetic field obtained by CSSS model exhibits little latitudinal variation, which is consistent with the Ulysses observation of the interplanetary magnetic field (IMF). On the other hand, the source surface field computed using the PFSS model shows a latitudinal structure. We have carried out a comparative study of the photospheric footpoints of open magnetic fields obtained dusing the two models. The magnetic neutral line was found to be coinciding in the two models, as expected. There are significant differences in the locations and sizes of the open field regions on the photosphere, and they are not always consistent with the observations of coronal holes. We present the results of the comparison.
Hoeksema Todd
Poduval Bala
Zhao Xiaopeng
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