The MHD study of the shock waves in the fast magnetic reconnection with the thermodynamic supersonic expansion acceleration process

Details The MHD study of the shock waves in the fast magnetic reconnection with the thermodynamic supersonic expansion acceleration process The MHD study of the shock waves in the fast magnetic reconnection with the thermodynamic supersonic expansion acceleration process

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm11b0814s&link_type=abstract

American Geophysical Union, Fall Meeting 2001, abstract #SM11B-0814

Physics

2744 Magnetotail, 2764 Plasma Sheet, 7519 Flares

Scientific paper

The structure of the slow and intermediate shock waves in the fast magnetic reconnection process is studied in MHD simulations and analytic research. Unlike the Petschek reconnection model, in this fast reconnection process a thermodynamic supersonic expansion acceleration mechanism works to accelerate the reconnection jet generated by slow shocks, and hence, the resulting jet can exceed the Alfven velocity measured in the upstream field region. The MHD simulation shows that the thermodynamic acceleration process destroys a pair of the slow shock associated with the Petschek reconnection model, and eventually generates a pair of intermediate shocks. But, according to more exact researches, just after the formation of the intermediate shock, the structure of the intermediate shock may start to be gradually deformed into the usual intermediate wave, slow shock and slow expansion waves, because the intermediate shock has not the steepening effect which is usually required for shock wave. We comprehensively discuss the fast reconnection process and the plasmoid (magnetic loop) formed by the reconnection process in the view of the MHD wave analysis.

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