With the Double Star Program TC1 in the equatorial orbit and Cluster tetrahedron in the high latitude polar orbit, a conjunct observation of FTEs on the dayside magnetopause (MP) on April 6, 2004 is presented in this ...With the Double Star Program TC1 in the equatorial orbit and Cluster tetrahedron in the high latitude polar orbit, a conjunct observation of FTEs on the dayside magnetopause (MP) on April 6, 2004 is presented in this study. The FTEs observed by TC1 at low latitudes are characterized to be generated in the subsolar region and the obtained flux tube axes orientate along the predicted low latitude component magnetic reconnection X-line, indicating that these FTEs were more likely to be generated through multiple X-line reconnection or single X-line bursty reconnec-tion. During the same period, Cluster also encountered a series of magnetosheath FTEs with their axes pointing roughly along the interplanetary magnetic field. At last, the global FTE configuration is obtained from observations in different loca-tions, which is in good agreement with the "elbow shape" model.展开更多
The signatures of flux ropes with obvious core magnetic field are detected by ClusterⅡ at the dayside magnetopause during 11: 00-11: 15 UT on Mar. 2, 2001. The similar characteristics can be found from the magnetic f...The signatures of flux ropes with obvious core magnetic field are detected by ClusterⅡ at the dayside magnetopause during 11: 00-11: 15 UT on Mar. 2, 2001. The similar characteristics can be found from the magnetic field variations recorded by the four spacecrafts (Cluster Ⅱ C1-C4). All the three (-/+) bipolar signatures in the BN com-ponent are accompanied with enhancements of BM and mag-netic field strength B in the boundary normal coordinates (LMN coordinates). A MHD simulation with two dimensions and three components is performed to explore the reconnec-tion process driven by the incoming flow of solar wind at the dayside magnetopause. The numerical results can illustrate the recurrent formation of magnetic structures with a core magnetic field. The time history of the magnetic field B and three components Bx, By and Bz at a given point of the cur-rent sheet can reproduce the observational features of the events mentioned above.展开更多
基金the NSFC (Grant No. 40731056)the Chinese Key Research Project (Grant No. 2006CB806300)
文摘With the Double Star Program TC1 in the equatorial orbit and Cluster tetrahedron in the high latitude polar orbit, a conjunct observation of FTEs on the dayside magnetopause (MP) on April 6, 2004 is presented in this study. The FTEs observed by TC1 at low latitudes are characterized to be generated in the subsolar region and the obtained flux tube axes orientate along the predicted low latitude component magnetic reconnection X-line, indicating that these FTEs were more likely to be generated through multiple X-line reconnection or single X-line bursty reconnec-tion. During the same period, Cluster also encountered a series of magnetosheath FTEs with their axes pointing roughly along the interplanetary magnetic field. At last, the global FTE configuration is obtained from observations in different loca-tions, which is in good agreement with the "elbow shape" model.
基金financially supported by the National Natural Science Fund for Distinguished Young Scholars(21925506)the National Natural Science Foundation of China(U21A20331 and 81903743)+5 种基金Ningbo S&T Innovation 2025 Major Special Programme(2018B10055)CAS Key Project of Frontier Science Research(QYZDBSSW-SYS030)Ningbo Natural Science Foundation(2021J192)Ningbo Key Scientific and Technological Project(2022Z117)Ningbo Public Welfare Science and Technology Planning Project(2021S149)ZBTI Scientific Research Innovation Team(KYTD202105)。
基金supported by the National Natural Science Foundation of China(Grant No.40174042)the Major project of the National Natural Science Foundation of China,and partly by the Innovation Engineering Fund of USTC.
文摘The signatures of flux ropes with obvious core magnetic field are detected by ClusterⅡ at the dayside magnetopause during 11: 00-11: 15 UT on Mar. 2, 2001. The similar characteristics can be found from the magnetic field variations recorded by the four spacecrafts (Cluster Ⅱ C1-C4). All the three (-/+) bipolar signatures in the BN com-ponent are accompanied with enhancements of BM and mag-netic field strength B in the boundary normal coordinates (LMN coordinates). A MHD simulation with two dimensions and three components is performed to explore the reconnec-tion process driven by the incoming flow of solar wind at the dayside magnetopause. The numerical results can illustrate the recurrent formation of magnetic structures with a core magnetic field. The time history of the magnetic field B and three components Bx, By and Bz at a given point of the cur-rent sheet can reproduce the observational features of the events mentioned above.
