Phase coherence of MHD waves in the solar wind

Details Phase coherence of MHD waves in the solar wind Phase coherence of MHD waves in the solar wind

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ssrv..107..463h&link_type=abstract

Space Science Reviews, v. 107, Issue 1, p. 463-466 (2003).

Astronomy and Astrophysics

Astronomy

16

Mhd Turbulence, Nonlinear Phenomena, Phase Synchronization

Scientific paper

Large amplitude MHD waves are commonly found in the solar wind. Nonlinear interactions between the MHD waves are likely to produce finite correlation among the wave phases. For discussions of various transport processes of energetic particles, it is fundamentally important to determine whether the wave phases are randomly distributed (as assumed in quasi-linear theories) or they have a finite coherence. Using a method based on a surrogate data technique and a fractal analysis, we analyzed Geotail magnetic field data (provided by S. Kokubun and T. Nagai through DARTS at the Institute of Space and Astronautical Science) to evaluate the phase coherence among the MHD waves in the earth's foreshock region. The correlation of wave phases does exist, indicating that the nonlinear interactions between the waves is in progress.

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