Physics
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006agusmsh51a..03h&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SH51A-03
Physics
7835 Magnetic Reconnection (2723, 7526), 2159 Plasma Waves And Turbulence, 2164 Solar Wind Plasma
Scientific paper
Recent observations of quasi-steady magnetic reconnection in the solar wind provide an important new environment to study the physical processes related to reconnection in the collisionless plasma. Strong wave activity in reconnection regions covering a broad frequency range has been detected in laboratory experiments and in the Earth's magnetosphere and the scattering of particles by electron plasma waves has been suggested as a source of anomalous resistivity. Using observations by the WIND spacecraft we have conducted a statistical study of the plasma wave activity associated with the solar wind reconnection events identified as intervals of accelerated plasma flows in magnetic field reversal regions. The TNR (Thermal Noise Receiver) and TDS (Time Domain Sampler) experiments on WIND provide measurements to investigate in detail different plasma wave modes. In particular TDS samples electric field waveforms at rates up to 120 000 samples/s. Three different wave modes are frequently identified within and at the boundaries of the reconnection regions: Electron solitary waves, ion acoustic waves and Langmuir waves. We will present examples of typical solar wind reconnection events and discuss the characteristic and location of the associated plasma waves. We also discuss the variations in the emission intensity at low frequencies and at the plasma frequency as a function of the distance from the X-line and the distance from the separatrices.
Bale Stuart D.
Davis Stacey M.
Huttunen K. E.
Phan Tai-Duc
Salem C.
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