• 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.

    A Perspective on the Scaling of Magnetosheath Turbulence and Effects of Bow Shock Properties

    Thumbnail
    View/Open
    Teodorescu(2021a).pdf (1.309Mb)
    Authors
    Teodorescu, E.
    Echim, M.
    Voitcu, G.
    Discipline
    Physical sciences
    Subject
    Interplanetary turbulence
    Solar-terrestrial interactions
    Planetary bow shocks
    Interplanetary magnetic fields
    Space plasmas
    Audience
    Scientific
    Date
    2021
    Metadata
    Show full item record
    Description
    We analyze magnetic field data from two magnetosheath crossings, representative of a larger collection of similar cases in the database of the Cluster spacecraft. We apply a novel data analysis method to identify the power-law behavior of the structure functions and to find the validity range of the power-law scaling. We validate the technique with solar wind magnetic field data and a synthetic magnetic field signal. This approach grants a rigorous determination of the scale range for a linear fit of the structure function in the log–log representation, which most often is chosen arbitrarily. The fitting allows an estimation of the power spectral index from the scale variation of the second-order structure function exponent. Data recorded during the first Cluster magnetosheath crossing, called Event 1, indicate three different power-law scaling regimes (injection, inertial, and kinetic) separated by two spectral breaks, consistent with the scenario of fully developed turbulence. However, data from the second Cluster magnetosheath crossing, called Event 2, depict a different scenario with only two power-law scaling regimes determined from the fit. A spectral slope shallower than the Kolmogorovian solar wind power-law index is determined at magnetohydrodynamic scales, spanning more than three frequency decades, which is separated by a spectral break from the kinetic regime. An analysis of simultaneous solar wind data from the Advanced Composition Explorer suggests that the scale behavior of the magnetosheath fluctuations might be controlled by the structure of the bow shock; solar wind turbulent fluctuations are only partially destroyed while they are carried across the bow shock. Both events are recorded in a quasi-perpendicular magnetosheath.
    Citation
    Teodorescu, E.; Echim, M.; Voitcu, G. (2021). A Perspective on the Scaling of Magnetosheath Turbulence and Effects of Bow Shock Properties. , The Astrophysical Journal, Vol. 910, Issue 1, A66, DOI: 10.3847/1538-4357/abe12d.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/7746
    doi: http://dx.doi.org/10.3847/1538-4357/abe12d
    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