Dayside Magnetic Reconnection and Precipitating Cusp Ions during a Southward Interplanetary Magnetic Field (imf) and Finite IMF by Component

Details Dayside Magnetic Reconnection and Precipitating Cusp Ions during a Southward Interplanetary Magnetic Field (imf) and Finite IMF by Component Dayside Magnetic Reconnection and Precipitating Cusp Ions during a Southward Interplanetary Magnetic Field (imf) and Finite IMF by Component

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm33b1902t&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM33B-1902

Physics

[2723] Magnetospheric Physics / Magnetic Reconnection, [2753] Magnetospheric Physics / Numerical Modeling

Scientific paper

We present a numerical simulation study of dayside magnetic reconnection during a southward interplanetary magnetic field (IMF) and finite IMF By component while the dipole tilt angle is 15 degree. A three-dimensional (3-D) global hybrid model is utilized, in which the fully-kinetic ion physics is solved in the self-consistent electromagnetic field and electrons are treated as a fluid. With a small current-dependent resistivity imposed, it is found that antiparallel reconnection is the dominant type of reconnection at the magnetopause under the specific conditions of the solar wind and IMF, consistent with satellite observations. For cases with By>0, locations of strongest ion precipitation shift to the dusk cusp in the northern hemisphere and the dawn cusp in the southern hemisphere, compared with cases of By=0. The impact of transient reconnection such as Flux Transfer Events (FTEs) on the magnetic topology and the dispersive nature of cusp ion energy spectra are discussed.

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