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Magnetic field-line reconnexion by localized enhancement of resistivity. Part 2. Quasi-steady process

Published online by Cambridge University Press:  13 March 2009

Takao Tsuda  and
Masayuki Ugai
Takao Tsuda
Affiliation:
Department of Electrical Engineering, Hokkaido University, Sapporo, Japan
Masayuki Ugai
Affiliation:
Department of Electrical Engineering, Ehime University, Matsuyama, Japan
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Abstract

We have described previously the evolutionary process of magnetic field-line reconnexion by a localized enhancement of resistivity. In this paper, it is demonstrated by numerical experiment that the evolution is eventually checked, with the system attaining a quasi-steady state. On the basis of the quasi-steady configuration, established from an initially antiparallel magnetic field, we can now clarify the MHD properties that are characteristic of the diffusion, field reversal and external regions, respectively, and then the mutual dependence among them. Especially, the physical processes in the diffusion region are noteworthy, since the ultimate cause for the present reconnexion process is the bending of the field lines towards the magnetic neutral point, which results from the locally enhanced resistivity assumed in the diffusion region. The present numerical results generally agree with the analytical results for the steady reconnexion, although some discrepancies exist owing to the differences of the postulated basic situations between them. It is pointed out that changes in flow properties across the boundary of the field reversal region agree well with those required for a slow mode compression wave and that the dominant process in the external region corresponds to a fast mode expansion.

Type
Research Article
Information
Journal of Plasma Physics , Volume 18 , Issue 3 , December 1977 , pp. 451 - 471
Copyright
Copyright © Cambridge University Press 1977

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References

REFERENCES

Cowley, S. W. H. 1975 J. Plasma Phys. 14, 475.Google Scholar
Heyvaerts, J., Priest, E. R. & Rust, D. M. 1977 Astrophys. J. (in press).Google Scholar
Kantrowitz, A. & Petschek, H. E. 1966 Plasma Physics in Theory and Applications (ed. Kunkel, W. B.), p. 148. McGraw-Hill.Google Scholar
Parker, E. N. 1963 Astrophys. J. Suppl. 8, 177.Google Scholar
Petschek, H. E. 1964 AAS-NASA Symp., Physics of Solar Flares, NASA SP.50, p. 425.Google Scholar
Priest, E. R. 1973 Astrophys. J. 181, 227.Google Scholar
Priest, E. R. & Cowley, S. W. H. 1975 J. Plasma Phys. 14, 271.Google Scholar
Richtmyer, R. D. & Morton, K. W. 1967 Difference Methods for Initial-Value Problems, 2nd edition, p. 365. Interscience.Google Scholar
Roberts, B. & Priest, E. R. 1975 J. Plasma Phys. 14, 417.Google Scholar
Sonnerup, B. U. O. 1970 J. Plasma Phys. 4, 161.Google Scholar
Sweet, P. A. 1958 Nouvo Cimento, 8, 188.Google Scholar
Ugai, M. & Tsuda, T. 1977 J. Plasma Phys. 17, 337.Google Scholar
Vasyliunas, V. 1975 Rev. Geophys. Space Phys. 13, 303.Google Scholar
Yeh, T. & Axford, W. I. 1970 J. Plasma Phys. 4, 207.Google Scholar