Physics
Scientific paper
Feb 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jgra..11602203s&link_type=abstract
Journal of Geophysical Research, Volume 116, Issue A2, CiteID A02203
Physics
Magnetospheric Physics: Magnetopause And Boundary Layers, Magnetospheric Physics: Magnetosphere: Inner, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions, Magnetospheric Physics: Magnetic Reconnection (7526, 7835)
Scientific paper
The magnetopause is the boundary where the reduced solar wind dynamic pressure is equal to the magnetic pressure of the Earth's outer magnetosphere. With hundreds of magnetopause crossings identified from the THEMIS data, we estimate a ratio (f) of the compressed magnetic field just inside the subsolar magnetopause to the purely dipolar magnetic field. Previous theoretical studies reported that the ratio f was nearly independent of the subsolar standoff distance (r0). Here we report that the ratio f is linearly proportional to r0 for both northward and southward interplanetary magnetic field (IMF). The proportionality constant for southward IMF is larger than that for northward IMF, implying that the compression level of the magnetic field by inward magnetopause for southward IMF is smaller than that for northward IMF.
Angelopoulos Vassilis
Chen Yen-Sen
Glassmeier Karl-Heintz
Hsieh W.-C.
Larson David
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