Does fast magnetic reconnection exist?

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Cosmic Plasma, Magnetic Field Configurations, Magnetic Field Reconnection, Nonuniform Magnetic Fields, Space Plasmas, Boundary Conditions, Magnetic Diffusion

Scientific paper

The main features of the Priest-Forbes (1986) and Priest-Lee (1990) models of magnetic reconnection in astrophysical plasmas are discussed, and the Priest-Lee model is generalized to include inflow pressure gradients and thus different regimes of reconnection. It is shown that different scaling results can be obtained depending on the boundary conditions. These results are compared to the ones observed in the numerical experiments of Biskamp (1986) and Lee and Fu (1986). It is concluded that numerical experiments with suitably designed boundary conditions are likely to exhibit fast reconnection, and that such reconnection is a common process in astrophysical and space plasmas.

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