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    Quiescent Discrete Auroral Arcs: A Review of Magnetospheric Generator Mechanisms

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    Authors
    Borovsky, J.E.
    Birn, J.
    Echim, M.M.
    Fujita, S.
    Lysak, R.L.
    Knudsen, D.J.
    Marghitu, O.
    Otto, A.
    Watanabe, T.-H.
    Tanaka, T.
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    Discipline
    Physical sciences
    Subject
    Aurora
    Magnetosphere
    Plasma physics
    Discrete arcs
    Audience
    Scientific
    Date
    2020
    Metadata
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    Description
    One of the longstanding questions of space science is: How does the Earth’s magnetosphere generate auroral arcs? A related question is: What form of energy is extracted from the magnetosphere to drive auroral arcs? Not knowing the answers to these questions hinders our ability to determine the impact of auroral arcs on the magnetospheric system. Magnetospheric mechanisms for driving quiescent auroral arcs are reviewed. Two types of quiescent arcs are (1) low-latitude non-Alfvénic (growth-phase) arcs magnetically connecting to the electron plasma sheet and (2) high-latitude arcs magnetically connecting near the plasma-sheet boundary layer. The reviews of the magnetospheric generator mechanisms are separated for the two types of quiescent arcs. The driving of auroral-arc currents in large-scale computer simulations is examined. Predicted observables in the magnetosphere and in the ionosphere are compiled for the various generator mechanisms.
    Citation
    Borovsky, J.E.; Birn, J.; Echim, M.M.; Fujita, S.; Lysak, R.L.; Knudsen, D.J.; Marghitu, O.; Otto, A.; Watanabe, T.-H.; Tanaka, T. (2020). Quiescent Discrete Auroral Arcs: A Review of Magnetospheric Generator Mechanisms. , Space Science Reviews, Vol. 216, Issue 1, A1, DOI: 10.1007/s11214-019-0619-5.
    Identifiers
    uri: https://orfeo.belnet.be/handle/internal/7508
    doi: http://dx.doi.org/10.1007/s11214-019-0619-5
    Type
    Article
    Peer-Review
    Yes
    Language
    eng
    Links
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