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Observation and simulation of flux rope structures at the dayside magnetopause

机译:日间磁更年期磁通绳结构的观测与模拟

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The signatures of flux ropes with obvious core magnetic field are detected by Cluster II 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 B_N component are accompanied with enhancements of B_M and magnetic 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 B_x, B_y and B_z at a given point of the current sheet can reproduce the observational features of the events mentioned above.
机译:簇II在2001年3月2日UT 11:00到11:15 UT白天在磁层顶上检测到了具有明显核心磁场的磁通量束的特征。从四个磁场记录的磁场变化中可以发现相似的特征。航天器(Cluster II C1-C4)。 B_N分量中的所有三个(-/ +)双极签名都伴随着边界法线坐标(LMN坐标)中B_M和磁场强度B的增强。进行了具有两个维度和三个组成部分的MHD模拟,以探索在日间磁更年期太阳风的传入流驱动下的重新连接过程。数值结果可以说明具有核心磁场的磁性结构的反复形成。磁场B和当前分量的给定点处的三个分量B_x,B_y和B_z的时程可以重现上述事件的观测特征。

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