3-D Hybrid Simulation of the Magnetopause Reconnection and Associated Cusp Precipitating Ions

Details 3-D Hybrid Simulation of the Magnetopause Reconnection and Associated Cusp Precipitating Ions 3-D Hybrid Simulation of the Magnetopause Reconnection and Associated Cusp Precipitating Ions

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm23d..07t&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #SM23D-07

Physics

[2706] Magnetospheric Physics / Cusp, [2723] Magnetospheric Physics / Magnetic Reconnection, [2724] Magnetospheric Physics / Magnetopause And Boundary Layers

Scientific paper

Dynamic magnetopause reconnection and the associated energy spectra of cusp precipitating ions are investigated using a 3-D self-consistent global hybrid simulation model. Even with steady solar wind conditions and a purely southward IMF, FTEs form spontaneously and evolve in time, developing signatures similar to additional reconnection regions at the magnetopause. Animations will show the development of the magnetic topology of FTEs. The ion velocity distributions originating from various apparent reconnection locations are also shown. The dispersive feature of the energy spectra of cusp precipitating ions obtained in the simualtion is consistent with satellite observations, i.e., higher energy particles appear at lower latitudes and lower energy particles at higher latitudes. By tracing particle trajectories during the evolution of magnetopause reconnection, the simulation reveals (1) how the features of the spectra are related to the ongoing magnetic FTEs or single-X line reconnection, (2) how and where particles are transmitted from the solar wind into the magnetosphere via direct magnetic reconnection on the dayside,and (3) how the motion of the cusp, particularly the latitudinal variation of the open/closed field line boundary, is correlated with the dayside reconnection and reflected in the spectra.

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