Note on one-fluid modeling of low-frequency Alfvénic fluctuations in a solar wind plasma with multi-ion components

Y. Nariyuki, T. Umeda, T. K. Suzuki, Tohru Hada

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    A simple point of view that non-zero Alfvén ratio (residual energy) appears as a consequence of one-fluid modeling of uni-directional Alfvén waves in a solar wind plasma is presented. Since relative speeds among ions are incorporated into the one-fluid model as a pressure anisotropy, the Alfvén ratio can be finite due to the decrease in the phase velocity. It is shown that a proton beam component typically found in the solar wind plasma can contribute to generating non-zero Alfvén ratio observed in the solar wind plasma. Local equilibrium velocity distribution functions of each ion component are also discussed by using maximum entropy principle.

    Original languageEnglish
    Article number124502
    JournalPhysics of Plasmas
    Volume22
    Issue number12
    DOIs
    Publication statusPublished - Dec 1 2015

    Fingerprint

    solar wind
    low frequencies
    fluids
    ions
    proton beams
    phase velocity
    velocity distribution
    distribution functions
    entropy
    anisotropy
    energy

    All Science Journal Classification (ASJC) codes

    • Condensed Matter Physics

    Cite this

    Note on one-fluid modeling of low-frequency Alfvénic fluctuations in a solar wind plasma with multi-ion components. / Nariyuki, Y.; Umeda, T.; Suzuki, T. K.; Hada, Tohru.

    In: Physics of Plasmas, Vol. 22, No. 12, 124502, 01.12.2015.

    Research output: Contribution to journalArticle

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