Magnetic Reconnection with Asymmetry in the Outflow Direction

Details Magnetic Reconnection with Asymmetry in the Outflow Direction Magnetic Reconnection with Asymmetry in the Outflow Direction

2009-12-23

arxiv.org/abs/0912.4552v1

Murphy, N. A., C. R. Sovinec, and P. A. Cassak (2010), Magnetic reconnection with asymmetry in the outflow direction, J. Geoph

Physics

Plasma Physics

12 pages, 8 figures. Submitted to JGR. Any comments will be appreciated

Scientific paper

10.1029/2009JA015183

Magnetic reconnection with asymmetry in the outflow direction occurs in the Earth's magnetotail, coronal mass ejections, flux cancellation events, astrophysical disks, spheromak merging experiments, and elsewhere in nature and the laboratory. A control volume analysis is performed for the case of steady antiparallel magnetic reconnection with asymmetric downstream pressure, which is used to derive scaling relations for the outflow velocity from each side of the current sheet and the reconnection rate. Simple relationships for outflow velocity are presented for the incompressible case and the case of symmetric downstream pressure but asymmetric downstream density. Asymmetry alone is not found to greatly affect the reconnection rate. The flow stagnation point and magnetic field null do not coincide in a steady state unless the pressure gradient is negligible at the flow stagnation point.

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