The Nature of Magnetic Reconnection at the Dayside Magnetopause in Global Magnetospheric MHD Simulations

Details The Nature of Magnetic Reconnection at the Dayside Magnetopause in Global Magnetospheric MHD Simulations The Nature of Magnetic Reconnection at the Dayside Magnetopause in Global Magnetospheric MHD Simulations

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm41a1991k&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM41A-1991

Physics

Plasma Physics

[2723] Magnetospheric Physics / Magnetic Reconnection, [2724] Magnetospheric Physics / Magnetopause And Boundary Layers, [2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions, [7835] Space Plasma Physics / Magnetic Reconnection

Scientific paper

Magnetic reconnection at the dayside magnetopause plays an important role in coupling energy in the solar wind to the magnetosphere. Quantifying this process has proved difficult because of the inherent three-dimensionality of the system. There has been much discussion of the location of the reconnection site and whether the reconnection is always anti-parallel or if there is a component in the direction of the current (a guide field). One model suggested the reconnection site is chosen by where the guide field is uniform. A recent model suggests that the reconnection site is chosen by the location at which the reconnection process is the most efficient (Swisdak and Drake, Geophys. Res. Lett., 34, L11106, 2007), but this has not been tested in global magnetospheric simulations. We present high resolution global magnetospheric magnetohydrodynamic simulations with the BATS-R-US code performed at NASA's Community Coordinated Modeling Center. A uniform resistivity is used to ensure the reconnection layers are resolved. Simulations are run with the clock angle of the interplanetary magnetic field varying between 0 and 180 degrees in 30 degree increments. Magnetic reconnection sites are located and models for dayside reconnection are tested.

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