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Aurora in the Polar Cap: A Review

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posted on 2020-05-22, 13:44 authored by Keisuke Hosokawa, Anita Kullen, Stephen Milan, Jade Reidy, Ying Zou, Harald U Frey, Romain Maggiolo, Robert Fear
This paper reviews our current understanding of auroral features that appear poleward of the main auroral oval within the polar cap, especially those that are known as Sun-aligned arcs, transpolar arcs, or theta auroras. They tend to appear predominantly during periods of quiet geomagnetic activity or northwards directed interplanetary magnetic field (IMF). We also introduce polar rain aurora which has been considered as a phenomenon on open field lines. We describe the morphology of such auroras, their development and dynamics in response to solar wind-magnetosphere coupling processes, and the models that have been developed to explain them.

Funding

K.H. is supported by JSPS Kakenhi (26302006). K.H., A.K., S.M., R.M., R.F. are supported by the International Space Science Institutes (ISSI) International Team program. J.R. was supported by Natural Environment Research Council studentship NE/L002531/1, R.F. by Science and Technology Facilities Council Consolidated Grant ST/R000719/1, and S.M. by STFC Consolidated Grant ST/N000749/1. Y.Z. is supported by UCAR’s Cooperative Programs for the Advancement of Earth System Science (Jack Eddy Postdoctoral Fellowship), and by National Science Foundation (AGS-1664885). H.F. was supported by NSF award AGS-1004736 and NASA’s Explorers Program through contracts NNG12FA45C and NNG12FA42I.

History

Citation

Hosokawa, K., Kullen, A., Milan, S. et al. Aurora in the Polar Cap: A Review. Space Sci Rev 216, 15 (2020). https://doi.org/10.1007/s11214-020-0637-3

Version

  • VoR (Version of Record)

Published in

Space Science Reviews

Volume

216

Issue

15

Publisher

Springer Verlag (Germany)

eissn

1572-9672

Acceptance date

2020-01-23

Copyright date

2020

Publisher DOI

Publisher version

Language

en

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    Keywords

    Uncategorised valuePolar cap auroraTranspolar arcSun-aligned arcPolar rain auroraIonospheric convectionMagnetosphereReconnection

    Licence

    CC BY 4.0

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