Aurora in the Polar Cap: A Review

Abstract
<p class="rtejustify">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.</p>
Year of Publication
2020
Journal
Space Science Reviews
Volume
216
Date Published
02/2020
ISSN Number
0038-6308
URL
https://link.springer.com/article/10.1007/s11214-020-0637-3
DOI
10.1007/s11214-020-0637-3