Structure of the magnetopause current layer at the subsolar point

Details Structure of the magnetopause current layer at the subsolar point Structure of the magnetopause current layer at the subsolar point

Feb 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992jgr....97.1389o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 97, Feb. 1, 1992, p. 1389-1395.

Physics

4

Current Sheets, Earth Magnetosphere, Magnetopause, Solar Wind, Interplanetary Magnetic Fields, Magnetoplasmadynamics, Plasma Layers, Simulation

Scientific paper

Attention is given to a 1D electromagnetic particle simulation model developed for the magnetopause current layer between the shocked solar wind and the dipole magnetic field at the subsolar point, which was extended to include the IMF in the solar wind. Interaction of the solar wind with the vacuum dipole field as well as the dipole field filled with a low-density magnetospheric plasma are investigated. The width and structure of the magnetopause current layer are found to differ markedly depending on the direction of the IMF. When the IMF is pointing southward, the current layer between the solar wind and the dipole field is narrow, and the magnetic field has a single ramp structure caused by the reflection of the solar wind at that point. The current layer becomes several times wider and the magnetic field develops a multiple ramp structure when the IMF is northward. Comparisons of these simulation results with the recent spacecraft data of the magnetopause crossing near the subsolar point are provided.

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