Observations of Turbulence Generated by Magnetic Reconnection

Details Observations of Turbulence Generated by Magnetic Reconnection Observations of Turbulence Generated by Magnetic Reconnection

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008agufmsm22a..02e&link_type=abstract

American Geophysical Union, Fall Meeting 2008, abstract #SM22A-02

Physics

7829 Kinetic Waves And Instabilities, 7835 Magnetic Reconnection (2723, 7526), 7859 Transport Processes, 7863 Turbulence (4490)

Scientific paper

Cluster observations of fluctuating electric and magnetic fields within a magnetic reconnection ion diffusion region (guide field ~ 0) in the Earth's magnetotail are presented. It is shown that in the inertial subrange, the electric and magnetic fluctuations both followed a -5/3 power law; at higher frequencies, the spectral indices were -1 and -8/3 respectively. The associated dispersion relation is examined, and is found to be consistent with fast mode/whistler waves. Lower hybrid waves, which could be enhanced by whistler mode conversion, are also observed. The anomalous resistivity associated with these waves is examined, and whilst it is thought that it does not significantly modify the reconnection rate, the waves could play a role in particle acceleration.

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