The University of Southampton
University of Southampton Institutional Repository

Saturn's elusive nightside polar arc

Record type: Article

Nightside polar arcs are some of the most puzzling auroral emissions at Earth. They are features which extend from the nightside auroral oval into the open magnetic field line region (polar cap), and they represent optical signatures of magnetotail dynamics. Here we report the first observation of an arc at Saturn, which is attached at the nightside main oval and extends into the polar cap region, resembling a terrestrial transpolar arc. We show that Earth-like polar arcs can exceptionally occur in a fast rotational and internally influenced magnetosphere such as Saturn's. Finally, we discuss the possibility that the polar arc at Saturn is related to tail reconnection and we address the role of solar wind in the magnetotail dynamics at Saturn.

PDF Radioti_et_al-2014-Geophysical_Research_Letters.pdf - Version of Record
Available under License Creative Commons Attribution.
Download (2MB)

Citation

Radioti, A., Grodent, D., Gérard, J.-C., Milan, S.E., Fear, R.C., Jackman, C.M., Bonfond, B. and Pryor, W. (2014) Saturn's elusive nightside polar arc Geophysical Research Letters, 41, (18), pp. 6321-6328. (doi:10.1002/2014GL061081).

More information

Accepted/In Press date: 8 September 2014
Published date: 24 September 2014
Organisations: Astronomy Group

Identifiers

Local EPrints ID: 394168
URI: http://eprints.soton.ac.uk/id/eprint/394168
ISSN: 0094-8276
PURE UUID: 8777d0a7-3c68-420f-9695-d030c800691e
ORCID for R.C. Fear: ORCID iD orcid.org/0000-0003-0589-7147

Catalogue record

Date deposited: 12 May 2016 10:46
Last modified: 17 Jul 2017 19:02

Export record

Altmetrics

Contributors

Author: A. Radioti
Author: D. Grodent
Author: J.-C. Gérard
Author: S.E. Milan
Author: R.C. Fear ORCID iD
Author: C.M. Jackman
Author: B. Bonfond
Author: W. Pryor

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×