Satellite Observations of Separator Line Geometry of Three-Dimensional Magnetic Reconnection
Abstract
Detection of a separator line that connects magnetic nulls and the determination of the dynamics and plasma environment of such a structure can improve our understanding of the three-dimensional (3D) magnetic reconnection process. However, this type of field and particle configuration has not been directly observed in space plasmas. Here we report the identification of a pair of nulls, the null-null line that connects them, and associated fans and spines in the magnetotail of Earth using data from the four Cluster spacecraft. With di and de designating the ion and electron inertial lengths, respectively, the separation between the nulls is found to be ~0.7di and an associated oscillation is identified as a lower hybrid wave with wavelength ~ de. This in situ evidence of the full 3D reconnection geometry and associated dynamics provides an important step toward to establishing an observational framework of 3D reconnection.
Keywords
Cite
@article{arxiv.0705.1021,
title = {Satellite Observations of Separator Line Geometry of Three-Dimensional Magnetic Reconnection},
author = {C. J. Xiao and X. G. Wang and Z. Y. Pu and Z. W. Ma and H. Zhao and G. P. Zhou and J. X. Wang and M. G. Kivelson and S. Y. Fu and Z. X. Liu and Q. G. Zong and M. W. Dunlop and K-H. Glassmeier and E. Lucek and H. Reme and I. Dandouras and C. P. Escoubet},
journal= {arXiv preprint arXiv:0705.1021},
year = {2007}
}
Comments
10 pages, 3 figures and 1 table