[PEM15-04] An Analysis of Slow-Shock and Slow Shock-Like Structures Observed in the 2D Hybrid Magnetic Reconnection Simulations
Keywords:Magnetic reconnection, Slow-mode shocks, Hybrid simulation
The simulations were performed with two different beta values, and were checked for the presence of slow-shocks using Rankine-Hugoniot conditions, and the specific conditions for Mach number, normal angles etc. . It was found that for high beta case, slow-shocks can be seen as close as ~10 λi (i = ion inertial length) from the X-point. For low plasma beta, a transition region exits, in which a slow shock-like structure is seen until ~70 λi . From ~70 λi slow-shock structure is present at all points. The slow-shock detection percentage in our simulations are found to be highly dependent on the determination of shock normal and on the angle at which the artificial spacecraft crosses the reconnection boundary. The ion distribution functions obtained show clear difference between the regions where slow-shocks are found and where they aren't. The downstream of slow-shocks is not thermalized and has two-component population, crescent-shaped hot beam population and cold population. These structures of ion distribution functions are similar to the ones observed by Geotail spacecraft slow-shock observations . We will also report the trajectories and the energization mechanisms of particles of both the populations.
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