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Current Sheet Formation in Weakly Ionized Plasmas |
| JI Hai-Sheng1,3; LI Xiao-Qing2;SONG Mu-Tao1,3 |
| 1Purple Mountain Observatory, Chinese Academy of Science, Nanjing 210008
2Department of Physics, Nanjing Normal University, Nanjing 210087
3National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100080 |
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| Cite this article: |
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JI Hai-Sheng, LI Xiao-Qing, SONG Mu-Tao 2001 Chin. Phys. Lett. 18 788-789 |
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Abstract Using the two fluid model, the problem of two-dimensional steady-state magnetic reconnection in incompressible resistive weakly ionized plasmas is analysed. Under the strong-coupling condition such as in the Sun's photosphere, it allows us to express the current sheet analytically. In this case the current sheet scales as η1/2. Then this model is used to understand magnetic flux cancellation which is observed in the Sun's magnetograms. To account for a canceling flux of 1 x 1018Max in a time interval of 77 min, the width of the current sheet is about ten kilometers.
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| Keywords:
52.30.Bt
52.30.Jb
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Published: 01 June 2001
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