HR: 1340h
AN: SM53B-0411    [Abstracts]
TI: Test particle simulation of MHD shock structure in fast magnetic reconnection
AU: * Shimizu, T
EM: shimizu@cs.ehime-u.ac.jp
AF: Ehime University, Dept. of Computer Science, Bunyo town 3, Matsuyama, 790-0921 Japan
AB: Test fluid particles are traced on the time-developed MHD simulation field data, in order to study MHD shock waves formed in fast magnetic reconnection. In general, when fast magnetic reconnection is steadily caused in the uniform current sheet, high speed plasma jet is generated by a pair of slow shocks and a plasmoid is formed in the downstream. According to our MHD simulations, when the plasmoid continue to propagate in the current sheet, the slow shock may be separated into two regions, i.e. reconnection jet region and plasmoid region. The reconnection jet is generated by the former slow shock. While, the propagation of the plasmoid is driven by the latter slow shock around the plasmoid. In addition, if the reconnection jet is supersonic, the slow shock in the jet region partially collapses, and then, intermediate waves and expansion waves appear in the jet region. The details of these MHD wave structures which are new features for the fast magnetic reconnection on the basis of MHD theory are reported by using test particle simulation technique.
DE: 7827 Kinetic and MHD theory
DE: 7835 Magnetic reconnection
DE: 7843 Numerical simulation studies
DE: 7851 Shock waves
DE: 2149 MHD waves and turbulence
SC: SPA-Magnetospheric Physics [SM]
MN: 2004 AGU Fall Meeting