Signatures of collisionless magnetic reconnection

Details Signatures of collisionless magnetic reconnection Signatures of collisionless magnetic reconnection

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003jgra..108.1111r&link_type=abstract

Journal of Geophysical Research (Space Physics), Volume 108, Issue A3, pp. SMP 6-1, CiteID 1111, DOI 10.1029/2002JA009699

Physics

Plasma Physics

23

Space Plasma Physics: Magnetic Reconnection, Space Plasma Physics: Numerical Simulation Studies, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers, Space Plasma Physics: Kinetic And Mhd Theory, Space Plasma Physics: Nonlinear Phenomena

Scientific paper

Simulations of magnetic reconnection in simple systems without a guide field predict the formation of a spatially antisymmetric out-of-plane magnetic field signature and a symmetric perturbation in the plasma pressure. Here we show, using two fluid simulations and analytic arguments, that these signatures are not in fact a generic feature of fast reconnection. Rather, in the strong guide field limit the pressure perturbation becomes antisymmetric, while the perturbation in the out-of-plane field can be either symmetric for βx ~ 1 or antisymmetric for βx >> 1, where βx is the plasma β defined using the reconnection magnetic field just upstream of the reconnection region.

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