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Aurora in the Polar Cap: A Review



AuthorHosokawa, Keisuke; Kullen, Anita; Milan, Steve; Reidy, Jade; Zou, Ying; Frey, Harald; Maggiolo, Romain; Fear, Robert;
Keywords
Abstract

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.

Year of Publication2020
JournalSpace Science Reviews
Volume216
Number of Pages
Section
Date Published02/2020
ISBN
URLhttps://link.springer.com/article/10.1007/s11214-020-0637-3
DOI10.1007/s11214-020-0637-3