On the Interaction of Kelvin-helmholtz Modes and Magnetic Reconnection for Large Magnetic Shear

Details On the Interaction of Kelvin-helmholtz Modes and Magnetic Reconnection for Large Magnetic Shear On the Interaction of Kelvin-helmholtz Modes and Magnetic Reconnection for Large Magnetic Shear

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm22b..05m&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM22B-05

Physics

[2723] Magnetospheric Physics / Magnetic Reconnection, [2724] Magnetospheric Physics / Magnetopause And Boundary Layers, [2752] Magnetospheric Physics / Mhd Waves And Instabilities, [2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions

Scientific paper

The Kelvin Helmholtz (KH) instability plays an important role for the transport of energy and momentum across a boundary layer. Nonlinear KH waves have been observed at the flank boundaries of the magnetosphere and models show that these waves can force reconnection and the transport of magnetosheath plasma onto closed geomagnetic field. There is some evidence that KH modes also operate for southward (largely anti-parallel) IMF orientation. However in this case magnetic reconnection and KH modes can operate simultaneously. Specifically the evolution of reconnection and large amplitude KH waves must be expected to interact with each other. Here this interaction is examined in the framework of three-dimensional MHD and Hall MHD simulations. It is important to note that Hall physics play an important role in the three-dimensional localization of reconnection. The presented study will consider different cases depending on the dominance of reconnection or KH waves initially. It is illustrated that the interaction can generate highly unusual flows in the vicinity of the diffusion region of magnetic reconnection.

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