Intermittent Reconnection, Flux Ropes and Vortices Generation at the Dayside Magnetopause

Details Intermittent Reconnection, Flux Ropes and Vortices Generation at the Dayside Magnetopause Intermittent Reconnection, Flux Ropes and Vortices Generation at the Dayside Magnetopause

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm51c0387k&link_type=abstract

American Geophysical Union, Fall Meeting 2004, abstract #SM51C-0387

Physics

7835 Magnetic Reconnection, 2724 Magnetopause, Cusp, And Boundary Layers, 2731 Magnetosphere: Outer, 2740 Magnetospheric Configuration And Dynamics, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

In the presence of a nonzero IMF By component and of southward IMF Bz, magnetic neutral points are formed near the flanks of the magnetosphere. The relative role of almost anti-parallel merging near neutral points vs. component reconnection at the subsolar stagnation point is a matter of ongoing discussions. To address this problem we employ global MHD model BATSRUS with adaptive mesh refinement. We perform simulations of magnetopause dynamics after IMF turning from an initial northward orientation to IMF clock angles 90 < θ < 180. An analysis of the reconnected magnetic flux budget showed that reconnection occurs along the extended area at magnetopause surface. We found that magnetopause surface become unstable and demonstrated formation of pressure bubbles, flux ropes (FTEs), and traveling density depletion regions. Vortices generation in the vicinity on magnetic neutral points at the flanks is also demonstrated. We discuss how these results depend on grid resolution.

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