Eastwood J P, Phan T D, Cassak P A, Gershman D J, Haggerty C, Malakit K, Shay M A, Mistry R, Øieroset M, Russell C T, Slavin J A, Argall M R, Avanov L A, Burch J L, Chen L J, Dorelli J C, Ergun R E, Giles B L, Khotyaintsev Y, Lavraud B, Lindqvist P A, Moore T E, Nakamura R, Paterson W, Pollock C, Strangeway R J, Torbert R B, Wang S
Blackett Laboratory Imperial College London London UK.
Space Sciences Laboratory University of California Berkeley California USA.
Geophys Res Lett. 2016 May 28;43(10):4716-4724. doi: 10.1002/2016GL068747. Epub 2016 May 18.
New Magnetospheric Multiscale (MMS) observations of small-scale (7 ion inertial length radius) flux transfer events (FTEs) at the dayside magnetopause are reported. The 10 km MMS tetrahedron size enables their structure and properties to be calculated using a variety of multispacecraft techniques, allowing them to be identified as flux ropes, whose flux content is small (22 kWb). The current density, calculated using plasma and magnetic field measurements independently, is found to be filamentary. Intercomparison of the plasma moments with electric and magnetic field measurements reveals structured non-frozen-in ion behavior. The data are further compared with a particle-in-cell simulation. It is concluded that these small-scale flux ropes, which are not seen to be growing, represent a distinct class of FTE which is generated on the magnetopause by secondary reconnection.
报告了对日间磁层顶处小尺度（约7个离子惯性长度半径）通量传输事件（FTEs）的新的磁层多尺度（MMS）观测结果。MMS四面体10公里的尺寸使得能够使用各种多航天器技术来计算它们的结构和特性，从而将它们识别为通量绳，其通量含量较小（约22千韦伯）。通过独立使用等离子体和磁场测量计算得出的电流密度呈丝状。将等离子体矩与电场和磁场测量结果进行比对，揭示了结构化的非冻结离子行为。还将数据与粒子模拟进行了进一步比较。得出的结论是，这些未见增长的小尺度通量绳代表了一类独特的FTE，它们是由磁层顶处的二次重联产生的。
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