Hall Magnetohydrodynamics Simulations of Separator Collapse

Details Hall Magnetohydrodynamics Simulations of Separator Collapse Hall Magnetohydrodynamics Simulations of Separator Collapse

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm31b1872d&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM31B-1872

Physics

Plasma Physics

[2723] Magnetospheric Physics / Magnetic Reconnection, [2724] Magnetospheric Physics / Magnetopause And Boundary Layers, [7829] Space Plasma Physics / Kinetic Waves And Instabilities, [7833] Space Plasma Physics / Mathematical And Numerical Techniques

Scientific paper

We compare MHD and Hall MHD simulations of magnetic separator collapse in two and three dimensions. Using a newly developed Hall MHD solver, we investigate how the collapse of two-dimensional X type magnetic nulls and three-dimensional null-null separator loops depends on the ratio of the magnetic field gradient scale length to the ion inertial length. In particular, we address the question of whether extended thin current sheets (as opposed to more localized Petschek-like diffusion regions) form in very large systems. Implications for magnetic reconnection at Earth's dayside magnetopause are discussed.

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