Small-Scale Dynamic Aurora

Small-scale dynamic auroras have spatial scales of a few km or less, and temporal scales of a few seconds or less, which visualize the complex interplay among charged particles, Alfvén waves, and plasma instabilities working in the magnetosphere-ionosphere coupled regions. We summarize the observed...

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Bibliographic Details
Published in:Space science reviews 2021-02, Vol.217 (1), p.17-17, Article 17
Main Authors: Kataoka, Ryuho, Chaston, Christopher C., Knudsen, David, Lynch, Kristina A., Lysak, Robert L., Song, Yan, Rankin, Robert, Murase, Kiyoka, Sakanoi, Takeshi, Semeter, Joshua, Watanabe, Tomo-Hiko, Whiter, Daniel
Format: Article
Language:English
Subjects:
Aerospace Technology and Astronautics
Alfven waves
Astrophysics and Astroparticles
Auroral Physics
Auroras
Charged particles
Ionosphere
Magnetic properties
Magnetohydrodynamic stability
Magnetohydrodynamics
Magnetospheres
Physics
Physics and Astronomy
Planetology
Plasma instabilities
Space Exploration and Astronautics
Space Sciences (including Extraterrestrial Physics
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Summary:Small-scale dynamic auroras have spatial scales of a few km or less, and temporal scales of a few seconds or less, which visualize the complex interplay among charged particles, Alfvén waves, and plasma instabilities working in the magnetosphere-ionosphere coupled regions. We summarize the observed properties of flickering auroras, vortex motions, and filamentary structures. We also summarize the development of fundamental theories, such as dispersive Alfvén waves (DAWs), plasma instabilities in the auroral acceleration region, ionospheric feedback instabilities (IFI), and the ionospheric Alfvén resonator (IAR).
ISSN:0038-6308
1572-9672
DOI:10.1007/s11214-021-00796-w