Physics
Scientific paper
Dec 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh32c..04b&link_type=abstract
American Geophysical Union, Fall Meeting 2003, abstract #SH32C-04
Physics
7835 Magnetic Reconnection, 7867 Wave/Particle Interactions, 7871 Waves And Instabilities
Scientific paper
Collisionless magnetic reconnection requires the presence of small-scale regions of intense electric fields near the x-line to break the frozen-flow condition and allow magnetic reorganization; this physics is embodied in the generalized Ohm's law. One such source of electric fields is that due to 'anomalous' resistivity associated with wave-particle interactions. Several wave modes have been suggested as agents of resistivity and, over the years, a body of data has been accumulated. We review observations of lower hybrid and whistler range electromagnetic waves at the terrestrial magnetopause, including new results from the Polar spacecraft near the neutral point. The potential role of anomalous resistivity is discussed in the existing data; typical wave amplitudes are a few orders of magnitude too small to account for significant resistivity, however, it may be that linear theories of wave-particle interactions are insufficient. We also propose observations required to identify the role of resistivity.
Bale Stuart D.
Mozer Forrest S.
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