Quiescent Discrete Auroral Arcs: A Review of Magnetospheric Generator Mechanisms

Joseph E. Borovsky, Joachim Birn, Marius M. Echim, Shigeru Fujita, Robert L. Lysak, David J. Knudsen, Octav Marghitu, Antonius Otto, Tomo Hiko Watanabe, Takashi Tanaka

Research output: Contribution to journalReview article

1 Citation (Scopus)

Abstract

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.

Original languageEnglish (US)
Article number1
JournalSpace Science Reviews
Volume216
Issue number1
DOIs
StatePublished - Feb 1 2020

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auroral arcs
magnetosphere
generators
arcs
plasma
magnetospheres
computer simulation
ionosphere
boundary layer
Earth magnetosphere
aerospace sciences
electron
electron plasma
tropical regions
polar regions
ionospheres
boundary layers
computerized simulation
energy

Keywords

  • Aurora
  • Discrete arcs
  • Magnetosphere
  • Plasma physics

Cite this

Borovsky, J. E., Birn, J., Echim, M. M., Fujita, S., Lysak, R. L., Knudsen, D. J., ... Tanaka, T. (2020). Quiescent Discrete Auroral Arcs: A Review of Magnetospheric Generator Mechanisms. Space Science Reviews, 216(1), [1]. https://doi.org/10.1007/s11214-019-0619-5

Quiescent Discrete Auroral Arcs : A Review of Magnetospheric Generator Mechanisms. / Borovsky, Joseph E.; Birn, Joachim; Echim, Marius M.; Fujita, Shigeru; Lysak, Robert L.; Knudsen, David J.; Marghitu, Octav; Otto, Antonius; Watanabe, Tomo Hiko; Tanaka, Takashi.

In: Space Science Reviews, Vol. 216, No. 1, 1, 01.02.2020.

Research output: Contribution to journalReview article

Borovsky, JE, Birn, J, Echim, MM, Fujita, S, Lysak, RL, Knudsen, DJ, Marghitu, O, Otto, A, Watanabe, TH & Tanaka, T 2020, 'Quiescent Discrete Auroral Arcs: A Review of Magnetospheric Generator Mechanisms', Space Science Reviews, vol. 216, no. 1, 1. https://doi.org/10.1007/s11214-019-0619-5
Borovsky, Joseph E. ; Birn, Joachim ; Echim, Marius M. ; Fujita, Shigeru ; Lysak, Robert L. ; Knudsen, David J. ; Marghitu, Octav ; Otto, Antonius ; Watanabe, Tomo Hiko ; Tanaka, Takashi. / Quiescent Discrete Auroral Arcs : A Review of Magnetospheric Generator Mechanisms. In: Space Science Reviews. 2020 ; Vol. 216, No. 1.
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