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| Paper: |
Modeling Source Surface Plasma and Magnetic Field Based on Expansion Factor fS and Angular Distance θb Between the Foot Points |
| Volume: |
474, Numerical Modeling of Space Plasma Flows (ASTRONUM2012) |
| Page: |
172 |
| Authors: |
Shen, F.; Feng, X.; Xiang, C.; Wu, S. T. |
| Abstract: |
The purpose of this paper is to model the distribution of plasma and
magnetic field on the source surface of 2.5 RS covering four
different phases of solar activity. We use the expansion factor
fS and the angular distance θb in specifying the
solar wind speed on the source surface, which can separate the open
field region and the close field region effectively. We select 136
Carrington Rotations (CRs) covering four different phases of solar
activity, and use an empirical model of the magnetic field topology
by Wilcox Solar Observatory (WSO) and an empirically derived global
coronal density distribution by MKIII in High Altitude Observatory
(HAO) as input. The solar wind speed at 1AU derived from the new
distribution on the source surface works much better than one
derived from the previous method (Shen et al. 2010), as compared with
observational data. |
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