Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm43a1071l&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM43A-1071
Physics
2784 Solar Wind/Magnetosphere Interactions, 2790 Substorms
Scientific paper
Three dimensional PIC simulations are performed in order to analyse the dynamics of the magnetotail as the interplanetary magnetic field (IMF) rotates from northward to southward direction. This dynamics reveals to be quite different within meridan/equatorial planes over two successive phases of this rotation. First , as IMF rotates from North to Dawn-Dusk direction, the X-Point (magnetic reconnection) evidenced in the magnetotail (meridian plane) is moving earthward (from x=-35 Re to x=-17.5 ) distance at which it stabilizes. This motion is coupled with the formation of "Crosstail- S" patterns (within the plane perpendicular to the Sun-Earth mine) through the neutral sheet in the nearby magnetotail. Second, as IMF rotates from dawndusk to South, the minimum B field region is expanding within the equatorial plane and forms a ring . This two-steps dynamics is analyzed in strong association with the cross field magnetotail current Jy, in order to recover the signatures of substorms triggering.
Cai David
Lembege Bertand
Nishikawa Ken
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