Cluster Observations of Electromagnetic Waves in the Vicinity of a Reconnection X-Line at the High-Latitude Magnetopause

Details Cluster Observations of Electromagnetic Waves in the Vicinity of a Reconnection X-Line at the High-Latitude Magnetopause Cluster Observations of Electromagnetic Waves in the Vicinity of a Reconnection X-Line at the High-Latitude Magnetopause

Dec 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003agufmsh32c..05p&link_type=abstract

American Geophysical Union, Fall Meeting 2003, abstract #SH32C-05

Physics

2724 Magnetopause, Cusp, And Boundary Layers, 2772 Plasma Waves And Instabilities, 7835 Magnetic Reconnection

Scientific paper

On March 18, 2002, under northward interplanetary field conditions, the Cluster spacecraft observed reconnection signatures and the passage of an X-line at the large (~175 deg.) magnetic shear high-latitude magnetopause [Phan et al., 2003]. The X-line passage was indicated by the detection of reconnection jet reversal while the spacecraft were in the magnetopause. Here we examine the particle and field properties as a function of the distance from the X-line. In the vicinity of the X-line, intense electric field fluctuations are observed with amplitudes reaching 150 mV/m. The electric field fluctuation level is much reduced in the outflow region. In contrast to the electric field behavior, the magnetic field fluctuations are smaller in the vicinity of the X-line than in the outflow region. In terms of particle properties, D-shaped ion distributions (with low-energy cutoff at the deHoffmann-Teller velocity) are seen close to the X-line as well as in the outflow region. Phan et al., Simultaneous Cluster and IMAGE observations of cusp reconnection and auroral proton spot for northward IMF, Geophys. Res. Lett, 30(10), 1509, doi:10.1029/2003GL016885, 2003.

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