Abstract
Magnetohydrodynamic (MHD) turbulence is commonly observed in the solar wind. Nonlinear interactions among MHD waves are likely to produce finite correlation of 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 the quasi-linear theory) or have a finite coherence. Using a method based on the surrogate data technique, we analysed the GEOTAIL magnetic field data to evaluate the phase coherence in MHD turbulence in the Earth's foreshock region. The results demonstrate the existence of finite phase correlation, indicating that nonlinear wave-wave interactions are in progress.
| Original language | English |
|---|---|
| Pages (from-to) | 447-457 |
| Number of pages | 11 |
| Journal | Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences |
| Volume | 366 |
| Issue number | 1864 |
| DOIs | |
| Publication status | Published - Feb 13 2008 |
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All Science Journal Classification (ASJC) codes
- Mathematics(all)
- Engineering(all)
- Physics and Astronomy(all)
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Experimental evidence of phase coherence of magnetohydrodynamic turbulence in the solar wind : GEOTAIL satellite data. / Koga, D.; Chian, A. C.L.; Hada, Tohru; Rempel, E. L.
In: Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 366, No. 1864, 13.02.2008, p. 447-457.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Experimental evidence of phase coherence of magnetohydrodynamic turbulence in the solar wind
T2 - GEOTAIL satellite data
AU - Koga, D.
AU - Chian, A. C.L.
AU - Hada, Tohru
AU - Rempel, E. L.
PY - 2008/2/13
Y1 - 2008/2/13
N2 - Magnetohydrodynamic (MHD) turbulence is commonly observed in the solar wind. Nonlinear interactions among MHD waves are likely to produce finite correlation of 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 the quasi-linear theory) or have a finite coherence. Using a method based on the surrogate data technique, we analysed the GEOTAIL magnetic field data to evaluate the phase coherence in MHD turbulence in the Earth's foreshock region. The results demonstrate the existence of finite phase correlation, indicating that nonlinear wave-wave interactions are in progress.
AB - Magnetohydrodynamic (MHD) turbulence is commonly observed in the solar wind. Nonlinear interactions among MHD waves are likely to produce finite correlation of 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 the quasi-linear theory) or have a finite coherence. Using a method based on the surrogate data technique, we analysed the GEOTAIL magnetic field data to evaluate the phase coherence in MHD turbulence in the Earth's foreshock region. The results demonstrate the existence of finite phase correlation, indicating that nonlinear wave-wave interactions are in progress.
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UR - http://www.scopus.com/inward/citedby.url?scp=37549047268&partnerID=8YFLogxK
U2 - 10.1098/rsta.2007.2102
DO - 10.1098/rsta.2007.2102
M3 - Article
VL - 366
SP - 447
EP - 457
JO - Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
JF - Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
SN - 0962-8428
IS - 1864
ER -