相対論的Sweet-Parker型磁気リコネクションの数値的研究(宇宙・惑星(1),一般講演)

概要

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We investigate the dynamics of the relativistic Sweet-Parker type magnetic reconnection by means of Relativistic Resistive Magnetohydrodynamic (RRMHD) simulation. It is found that the magnetic energy is preferentially converted to the thermal energy in the diffusion region, resulting the formation of the sub-Alfvenic outflow due to the increase in the plasma inertia. This fact indicates that the enhancement of the reconnection rate due to the effect of the Lorentz contraction cannot be expected in the relativistic Sweet-Parker reconnection. Since the observed Lorentz factor of the outflow and the reconnection rate are both small, our numerical model suggests that the relativistic Sweet-Parker reconnection is a slow process for the magnetic energy conversion as well as the non-relativistic one.
2010-09-09