Experimental evidence of phase coherence of magnetohydrodynamic turbulence in the solar wind

GEOTAIL satellite data

D. Koga, A. C.L. Chian, Tohru Hada, E. L. Rempel

    Research output: Contribution to journalArticle

    6 Citations (Scopus)

    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 languageEnglish
    Pages (from-to)447-457
    Number of pages11
    JournalPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
    Volume366
    Issue number1864
    DOIs
    Publication statusPublished - Feb 13 2008

    Fingerprint

    magnetohydrodynamic turbulence
    Solar wind
    phase coherence
    Magnetohydrodynamics
    solar wind
    Turbulence
    Satellites
    Phase Correlation
    Surrogate Data
    Wave Interaction
    Transport Processes
    Nonlinear Interaction
    Nonlinear Waves
    wave interaction
    energetic particles
    magnetohydrodynamic waves
    Likely
    Magnetic Field
    Beam plasma interactions
    Evaluate

    All Science Journal Classification (ASJC) codes

    • Mathematics(all)
    • Engineering(all)
    • Physics and Astronomy(all)

    Cite this

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    title = "Experimental evidence of phase coherence of magnetohydrodynamic turbulence in the solar wind: GEOTAIL satellite data",
    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.",
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    doi = "10.1098/rsta.2007.2102",
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    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

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    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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