Experimental evidence of phase coherence of magnetohydrodynamic turbulence in the solar wind: GEOTAIL satellite data

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

    研究成果: ジャーナルへの寄稿学術誌査読

    7 被引用数 (Scopus)

    抄録

    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.

    本文言語英語
    ページ(範囲)447-457
    ページ数11
    ジャーナルPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences
    366
    1864
    DOI
    出版ステータス出版済み - 2月 13 2008

    !!!All Science Journal Classification (ASJC) codes

    • 数学 (全般)
    • 工学(全般)
    • 物理学および天文学(全般)

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