# Reconnection in a weakly stochastic field

@article{Lazarian1999ReconnectionIA, title={Reconnection in a weakly stochastic field}, author={Alexander Lazarian and Ethan T. Vishniac}, journal={The Astrophysical Journal}, year={1999}, volume={517}, pages={700-718} }

We examine the effect of weak, small-scale magnetic field structure on the rate of reconnection in a strongly magnetized plasma. This affects the rate of reconnection by reducing the transverse scale for reconnection flows and by allowing many independent flux reconnection events to occur simultaneously. Allowing only for the first effect and using Goldreich & Sridhar's model of strong turbulence in a magnetized plasma with negligible intermittency, we find a lower limit for the reconnection…

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## References

SHOWING 1-10 OF 82 REFERENCES

Reconnection in the Interstellar Medium

- Physics
- 1999

We discuss the role of ambipolar diffusion for simple reconnection in a partially ionized gas, following the reconnection geometry of Parker and Sweet. When the recombination time is short, the…

Reconnection rates of magnetic fields including the effects of viscosity

- Physics
- 1984

The Sweet–Parker and Petschek scalings of the magnetic reconnection rate are modified to include the effect of the viscosity. The modified scalings show that the viscous effect can be important in…

Fast magnetic reconnection and sudden enhancement of current sheets due to inward boundary flows

- Physics
- 1996

Magnetic reconnection is widely believed to be involved in dynamical phenomena such as solar flares or magnetospheric substorms. The Sweet–Parker model of magnetic reconnection in a Y‐type geometry…

The Rate of Magnetic Reconnection Observed in the Solar Atmosphere

- Physics
- 1996

The structure of the solar corona is often observed to evolve in a manner that is generally attributed to the process of magnetic field line reconnection. The spatial and temporal scales for a…

Turbulent magnetic reconnection

- Physics
- 1986

The effects of turbulence on magnetic reconnection are investigated by two‐dimensional spectral method magnetohydrodynamic computations. The nonlinear evolution of the periodic sheet pinch…

Magnetic Reconnection via Current Sheets

- Physics
- 1986

A general picture of magnetic reconnection in the framework of 2‐D incompressible resistive magnetohydrodynamic theory is presented. Numerical studies of (quasi‐) steady‐state driven reconnection…

Two-fluid theory of collisionless magnetic reconnection

- Physics
- 1997

Theoretical studies of collisionless reconnection in the framework of two-fluid theory are presented. In the high-β case (β≳1) reconnection is controlled by the whistler mode, leading to decoupling…

Structure of the dissipation region during collisionless magnetic reconnection

- Physics
- 1998

Collisionless magnetic reconnection is studied using a 2 1/2-dimensional hybrid code including Hall dynamics and electron inertia. The simulations reveal that the dissipation region develops a…

Role of photospheric footpoint shear in the impulsive dynamics of the solar corona

- Physics
- 1996

A frequently observed feature of a solar flare is its impulsive growth from a relatively quiescent background. This imposes a significant constraint on magnetic reconnection models which propose to…

Can the turbulent galactic dynamo generate large-scale magnetic fields?

- Physics
- 1998

Large-scale magnetic fields in galaxies are thought to be generated by a turbulent dynamo. However, the same turbulence also leads to a small-scale dynamo which generates magnetic noise at a more…