Astronomy and Astrophysics – Astrophysics
Scientific paper
2002-10-09
Astrophys.J. 589 (2003) 893-901
Astronomy and Astrophysics
Astrophysics
22 pages, 4 figures, submitted to ApJ
Scientific paper
10.1086/374808
The dynamics of the steady-state Sweet--Parker-type reconnection is analyzed in relativistic regime when energy density in the inflowing region is dominated by magnetic field. The structure of reconnection layer (its thickness, inflow and outflow velocities) depends on the ratio of two large dimensionless parameters of the problem - magnetization parameter $\sigma \gg 1$ (the ratio of the magnetic to particle energy-densities in the inflowing region) and the Lundquist number $S$. The inflow velocity may be relativistic (for $ S< \sigma$) or non-relativistic (for $ S > \sigma$), while the outflowing plasma is moving always relativisticly. For extremely magnetized plasmas with $\sigma \geq S^2$, the inflow four-velocity becomes of the order of the \Alfven four-velocity.
Lyutikov Maxim
Uzdensky Dmitri
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