Magnetohydrodynamic structure of a plasmoid in fast reconnection in low-beta plasmas

Zenitani, Seiji; Miyoshi, Takahiro
February 2011
Physics of Plasmas;Feb2011, Vol. 18 Issue 2, p022105
Academic Journal
Plasmoid structures in fast reconnection in low-beta plasmas are investigated by two-dimensional magnetohydrodynamic simulations. A high-resolution shock-capturing code enables us to explore a variety of shock structures: vertical slow shocks behind the plasmoid, another slow shock in the outer-region, and the shock-reflection in the front side. The Kelvin-Helmholtz-like turbulence is also found inside the plasmoid. It is concluded that these shocks are rigorous features in reconnection in low-beta plasmas, where the reconnection jet speed or the upstream Alfvén speed exceeds the sound speed.


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