Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm23a1187b&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM23A-1187
Physics
7811 Discontinuities (2109), 7827 Kinetic And Mhd Theory, 7835 Magnetic Reconnection (2723, 7526)
Scientific paper
Recent multisatellite observations of reconnection in the solar wind show that vey long extended x-lines are present[1]. Recently we have proposed a mechanism for the extension of x-lines [2]. However, our previous study was limited to zero guide field (antiparallel reconnection). We extend the study here to different guide field values (component reconnection). The dynamics of x-line formation and evolution in 3D magnetic reconnection is studied using a fully kinetic approach. An x-line of small length is initialized using a perturbation localized in the current direction. The electrons and ions drift diamagnetically along the current direction of the initial x-line and are further accelerated by the reconnection electric field. The electron and ion motion is in opposite directions and each species extends one end of the x-line. The effect of the guide field is shown to alter significantly the modus of extension of the x-line. [1] Phan et al., Nature, 439, 7073, 175 (2006). [2] Lapenta, G., et al., Geophys. Res. Lett., 33, L10102 (2006).
Bucher Sabina
Lapenta Giovanni
Wan Wenjie
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