Super-Alfvénic Propagation of Substorm Reconnection Signatures and Poynting Flux

Details Super-Alfvénic Propagation of Substorm Reconnection Signatures and Poynting Flux Super-Alfvénic Propagation of Substorm Reconnection Signatures and Poynting Flux

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011phrvl.107f5001s&link_type=abstract

Physical Review Letters, vol. 107, Issue 6, id. 065001

Physics

1

Magnetic Reconnection, Magnetic Reconnection, Magnetotail, Magnetic Reconnection

Scientific paper

The propagation of reconnection signatures and their associated energy are examined using kinetic particle-in-cell simulations and Cluster satellite observations. It is found that the quadrupolar out-of-plane magnetic field near the separatrices is associated with a kinetic Alfvén wave. For magnetotail parameters, the parallel propagation of this wave is super-Alfvénic (V∥˜1500-5500km/s) and generates substantial Poynting flux (S˜10-5-10-4W/m2) consistent with Cluster observations of magnetic reconnection. This Poynting flux substantially exceeds that due to frozen-in ion bulk outflows and is sufficient to generate white light aurora in Earth’s ionosphere.

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