| Magnetic reconnection structures in the boundary layer of an interplanetary magnetic cloud |
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| 引用本文： | WEI Fengsi,LIU Rui,FENG Xueshang,ZHONG Dingkun & YANG FangKey Laboratory for Space Weather,Chinese Academy of Sciences,Beijing 100080,China. Magnetic reconnection structures in the boundary layer of an interplanetary magnetic cloud[J]. 中国科学E辑(英文版), 2004, 47(1): 6-14. DOI: 10.1360/02ye0241 |
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| 作者姓名： | WEI Fengsi LIU Rui FENG Xueshang ZHONG Dingkun & YANG FangKey Laboratory for Space Weather Chinese Academy of Sciences Beijing 100080 China |
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| 作者单位： | WEI Fengsi，LIU Rui，FENG Xueshang，ZHONG Dingkun & YANG FangKey Laboratory for Space Weather，Chinese Academy of Sciences，Beijing 100080，China |
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| 摘 要： | An interplanetary magnetic diffusion region was detected by WIND during 0735-0850 UT on May 15, 1997 when the front boundary layer of a magnetic cloud passed through the spacecraft about 190 earth radii upstream of the earth. The main signals of magnetic reconnection processes are: (i) Flow reversal was detected at about 0810 UT. The counter-streaming flows have the speeds of about 65 and 41 km/s, respectively, with an angle of about 140 degree between them. (ii) Hall magnetic field was detected. The Hall fields -By and +By, perpendicular to the X-Z plane, with their magnitude up to -7.0 nT, are superposed upon a guide field about 12 nT. (iii) Alfvenic fluctuations are obviously intensified inside the reconnection region; at the front boundary of the reconnection region, a slow-mode-like discontinuity was detected.(iv) Ions are heated intensively inside the reconnection region, with their temperature three times higher than that ahead of the boundary layer; electrons are also heated, with a little enhan
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Magnetic reconnection structures in the boundary layer of an interplanetary magnetic cloud |
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| Wei Fengsi,Liu Rui,Feng Xueshang,Zhong Dingkun,Yang Fang. Magnetic reconnection structures in the boundary layer of an interplanetary magnetic cloud[J]. Science in China(Technological Sciences), 2004, 47(1): 6-14. DOI: 10.1360/02ye0241 |
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| Authors: | Wei Fengsi Liu Rui Feng Xueshang Zhong Dingkun Yang Fang |
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| Affiliation: | Key Laboratory for Space Weather, Chinese Academy of Sciences, Beijing 100080, China |
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| Abstract: | An interplanetary magnetic diffusion region was detected by WIND during 0735-0850 UT on May 15, 1997 when the front boundary layer of a magnetic cloud passed through the spacecraft about 190 earth radii upstream of the earth. The main signals of magnetic reconnection processes are: (i) Flow reversal was detected at about 0810 UT. The counter-streaming flows have the speeds of about 65 and 41 km/s, respectively, with an angle of about 140 degree between them. (ii) Hall magnetic field was detected. The Hall fields -By and +By, perpendicular to the X-Z plane, with their magnitude up to -7.0 nT, are superposed upon a guide field about 12 nT. (iii) Alfvenic fluctuations are obviously intensified inside the reconnection region; at the front boundary of the reconnection region, a slow-mode-like discontinuity was detected.(iv) Ions are heated intensively inside the reconnection region, with their temperature three times higher than that ahead of the boundary layer; electrons are also heated, with a little enhancement in their temperature. The above observations indicate that magnetic reconnection processes could take place in interplanetary space. |
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| Keywords: | solar wind interplanetary magnetic clouds magnetic reconnection. |
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