Physics – Plasma Physics
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004agufmsm53b0421s&link_type=abstract
American Geophysical Union, Fall Meeting 2004, abstract #SM53B-0421
Physics
Plasma Physics
7800 Space Plasma Physics, 7823 Ionization Processes, 7835 Magnetic Reconnection, 7839 Nonlinear Phenomena, 7843 Numerical Simulation Studies
Scientific paper
A bi-polar (southward-then-northward) signature of Bz component at the leading edge of earthward jets in the magnetotail has been reported [Slavin et al. 2003]. Here we try to reproduce this magnetic field feature by three-dimensional reconnection (finite extent in the dawn-dusk direction) in the presence of non-zero guide field (dawn-dusk magnetic component). Setting the guide field intensity by referring to Slavin et al. and setting the dawn-dusk extent of the reconnection region to an often quoted value [Angelopoulos et al., 1997], we managed to reproduce the bi-polar signatures by a 3-D (Hall) MHD simulation with anomalous resistivity. Redirecting the argument, the bi-polar signature may be taken as the evidence that the dawn-dusk width of the reconnection region is less than several Earth radii.
Fujimoto Minoru
Shirataka N.
Tandokoro Ryoji
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