A Self-similar Solution of Fast Magnetic Reconnection: A Semianalytic Study of the Inflow Region

An evolutionary process of fast magnetic reconnection in "free space," which is free from any influence from outer circumstances, has been studied semianalytically, and a self-similarly expanding solution has been obtained. The semianalytic solution is consistent with the results of the numerical simulations performed in our previous paper. This semianalytic study confirms the existence of self-similar growth. On the other hand, numerical study by time-dependent computer simulation clarifies the stability of the self-similar growth with respect to any MHD mode. These results confirm the stable self-similar evolution of the fast magnetic reconnection system.