Large-scale topology of magnetic reconnection at the dayside magnetopause

Details Large-scale topology of magnetic reconnection at the dayside magnetopause Large-scale topology of magnetic reconnection at the dayside magnetopause

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agufmsm51d..05b&link_type=abstract

American Geophysical Union, Fall Meeting 2006, abstract #SM51D-05

Mathematics

Logic

2723 Magnetic Reconnection (7526, 7835), 2724 Magnetopause And Boundary Layers, 2753 Numerical Modeling, 7835 Magnetic Reconnection (2723, 7526)

Scientific paper

Measurements from multi-spacecraft mission offer a unique opportunity to investigate the large-scale topology of magnetic reconnection at the dayside magnetosphere. The principle of these studies consists of using interplanetary magnetic field (IMF) and plasma parameters measured by solar wind monitors upstream of the bow shock as input to global simulations and testing the validity of their predictions by comparing large-scale topological features deduced from the simulations with multi-spacecraft measurements located downstream of the bow shock. In this paper, we present the results of event studies using three-dimensional global magnetohydrodynamic (MHD) simulations and observations from the DOUBLE STAR (TC1) and CLUSTER spacecraft. In particular, we report the study of cases when the IMF has a strong east-west component. Simulation results indicate the simultaneous occurrence of antiparallel merging at high latitudes and component merging in the subsolar region. The locations of the high-latitude merging sites, though distorted, are mostly consistent with the antiparallel merging model. However, analysis of the parallel electric field indicates that component reconnection is patchy and limited to a relatively small region of the subsolar magnetopause, and does not seem to form a clear merging line as predicted by simple geometrical constructions.

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