• Login
     
    View Item 
    •   ORFEO Home
    • Royal Belgian Institute for Space Aeronomy
    • BIRA-IASB publications
    • View Item
    •   ORFEO Home
    • Royal Belgian Institute for Space Aeronomy
    • BIRA-IASB publications
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Nonlocal nonlinear coupling of kinetic sound waves

    Thumbnail
    View/Open
    Lyubchyk(2014).pdf (594.4Kb)
    Authors
    Lyubchyk, O.
    Voitenko, Y.
    Discipline
    Physical sciences
    Audience
    Scientific
    Date
    2014
    Metadata
    Show full item record
    Description
    We study three-wave resonant interactions among kinetic-scale oblique sound waves in the low-frequency range below the ion cyclotron frequency. The nonlinear eigenmode equation is derived in the framework of a two-fluid plasma model. Because of dispersive modifications at small wavelengths perpendicular to the background magnetic field, these waves become a decay-type mode. We found two decay channels, one into co-propagating product waves (forward decay), and another into counter-propagating product waves (reverse decay). All wavenumbers in the forward decay are similar and hence this decay is local in wavenumber space. On the contrary, the reverse decay generates waves with wavenumbers that are much larger than in the original pump waves and is therefore intrinsically nonlocal. In general, the reverse decay is significantly faster than the forward one, suggesting a nonlocal spectral transport induced by oblique sound waves. Even with low-amplitude sound waves the nonlinear interaction rate is larger than the collisionless dissipation rate. Possible applications regarding acoustic waves observed in the solar corona, solar wind, and topside ionosphere are briefly discussed.
    Citation
    Lyubchyk, O.; Voitenko, Y. (2014). Nonlocal nonlinear coupling of kinetic sound waves. , Annales Geophysicae, Vol. 32, Issue 11, 1407-1413, DOI: 10.5194/angeo-32-1407-2014.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/2858
    doi: http://dx.doi.org/10.5194/angeo-32-1407-2014
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
    NewsHelpdeskBELSPO OA Policy

    Browse

    All of ORFEOCommunities & CollectionsBy Issue DateAuthorsTitlesDisciplinesThis CollectionBy Issue DateAuthorsTitlesDisciplines
     

    DSpace software copyright © 2002-2016  DuraSpace
    Send Feedback | Cookie Information
    Theme by 
    Atmire NV