Skip to main content

Volume 53 Supplement 6

Special Issue: Magnetic Reconnection in Space and Laboratory Plasmas

  • Article
  • Published:

Magnetic reconnection: Sweet-Parker versus Petschek

Abstract

The two theories for magnetic reconnection, one of Sweet and Parker, and the other of Petschek, are reconciled by exhibiting an extra condition in that of Petschek which reduces his theory to that of Sweet and Parker, provided that the resistivity is constant in space. On the other hand, if the resistivity is enhanced by instabilities, then the reconnection rate of both theories is increased substantially, but Petschek’s rate can be faster. A different formula from the usual one is presented for enhanced Petschek reconnection.

References

  • Biskamp, D., Magnetic reconnection via current sheets, Phys. Fluids, 29, 1520, 1986.

    Article  Google Scholar 

  • Davidson, R., Anomalous transport properties associated with the lower-hybrid-drift instability, Phys. Fluids, 18, 1327, 1975.

    Article  Google Scholar 

  • Kulsrud, R. M., Magnetic reconnection in a magnetohydrodynamic plasma, Phys. Plasmas, 5, 1599, 1998.

    Article  Google Scholar 

  • Parker, E., Acceleration of cosmic rays in solar flares, Phys. Rev., 107, 830, 1957.

    Article  Google Scholar 

  • Petschek, H. E., Magnetic field annihilation, in Physics of Solar Flares, edited by W. N. Ness, NASA SP-50, p. 425, 1964.

    Google Scholar 

  • Sweet, P. A., The neutral point theory of solar flares, IAU Symposium No. 6 Electromagnetic Phenomena in Ionized Gases (Stockholm 1956), p. 123, 1958.

  • Uzdensky, D. A. and R. M. Kulsrud, Two-dimensional numerical simulation of the resistive reconnection layer, Phys. Plasmas, 7, 4018, 2000.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Russell M. Kulsrud.

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Kulsrud, R.M. Magnetic reconnection: Sweet-Parker versus Petschek. Earth Planet Sp 53, 417–422 (2001). https://doi.org/10.1186/BF03353251

Download citation

  • Received:

  • Revised:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1186/BF03353251

Keywords