Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsh44a1712k&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SH44A-1712
Physics
2723 Magnetic Reconnection (7526, 7835), 7526 Magnetic Reconnection (2723, 7835), 7835 Magnetic Reconnection (2723, 7526)
Scientific paper
Recent observations from the CLUSTER mission have shown that during geomagnetically disturbed times, the O+ number density in the plasma sheet close to the reconnection X-line in the Earth's magnetotail can become comparable to, or even higher than, the corresponding H+ number density and that the O+ ions carry most of the particle pressure [Kistler et al., 2005; Wygant et al. 2005]. The presence of O+ also has implications for transport processes at the magnetopause [e.g., Bouhram et al., 2005]. However, there has been no systematic kinetic study of effects of O+ on magnetic reconnection. Even something as basic as the linear properties of tearing mode in three-species plasma is currently lacking. This constitutes a major gap in theoretical understanding of reconnection in the magnetosphere and hampers understanding of spacecraft data. Using our nonlocal linear Vlasov code we have examined the effect of O+ on various current sheet instabilities such as lower hybrid drift instability and tearing mode. These results and their consequences for magnetic reconnection will be discussed.
Daughton William
Karimabadi Homa
Kistler Lynn M.
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