HR: 0800h
AN: SM31D-0661    [Abstracts]
TI: Demonstration of X-line retreat by a large scale full particle simulation
AU: * Shinohara, I
EM: iku@stp.isas.jaxa.jp
AF: ISAS/JAXA, 3-1-1 Yoshinodai, Sagamihara, 229-8510, Japan
AU: Oka, M
EM: mitsuo@ucr.edu
AF: UCR, 900 University Ave, Riverside, CA 92521-0000, United States
AU: Fujimoto, M
EM: fujimoto@stp.isas.jaxa.jp
AF: ISAS/JAXA, 3-1-1 Yoshinodai, Sagamihara, 229-8510, Japan
AB: The X-line retreat problem is investigated by a large scale two-dimensional full particle simulation. In the case where the obstacle sits close to the X-line, the collision between the reconnection flow and the obstacle may affect on the process right at the X-point. Carrying out a two-dimensional full particle simulation with an asymmetric condition for the reconnection flow, Oka et al. (presented in this meeting) found that the X-line moves away from the obstacle with the speed of ~ 0.1 Alfven speed. To examine more long-time evolution of the X- line retreat, we have performed a simulation of the X-line retreat with a larger simulation box whose scale size is more than ~ 100 ion inertia length. In this presentation, we will demonstrate how the X-line retreat evolves in the macroscopic view and will discuss its relation to the microscopic process in the X-line region.
DE: 7827 Kinetic and MHD theory
DE: 7835 Magnetic reconnection (2723, 7526)
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting