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Article: Dawn Auroral Breakup at Saturn Initiated by Auroral Arcs: UVIS/Cassini Beginning of Grand Finale Phase

TitleDawn Auroral Breakup at Saturn Initiated by Auroral Arcs: UVIS/Cassini Beginning of Grand Finale Phase
Authors
Keywordsaurora
magnetosphere
Saturn
Issue Date2017
Citation
Journal of Geophysical Research: Space Physics, 2017, v. 122, n. 12, p. 12111-12119 How to Cite?
AbstractWe present Cassini auroral observations obtained on 11 November 2016 with the Ultraviolet Imaging Spectrograph at the beginning of the F-ring orbits and the Grand Finale phase of the mission. The spacecraft made a close approach to Saturn's southern pole and offered a remarkable view of the dayside and nightside aurora. With this sequence we identify, for the first time, the presence of dusk/midnight arcs, which are azimuthally spread from high to low latitudes, suggesting that their source region extends from the outer to middle/inner magnetosphere. The observed arcs could be auroral manifestations of plasma flows propagating toward the planet from the magnetotail, similar to terrestrial “auroral streamers.” During the sequence the dawn auroral region brightens and expands poleward. We suggest that the dawn auroral breakup results from a combination of plasma instability and global-scale magnetic field reconfiguration, which is initiated by plasma flows propagating toward the planet. Alternatively, the dawn auroral enhancement could be triggered by tail magnetic reconnection.
Persistent Identifierhttp://hdl.handle.net/10722/334523
ISSN
2023 Impact Factor: 2.6
2023 SCImago Journal Rankings: 0.845
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorRadioti, A.-
dc.contributor.authorGrodent, D.-
dc.contributor.authorYao, Z. H.-
dc.contributor.authorGérard, J. C.-
dc.contributor.authorBadman, S. V.-
dc.contributor.authorPryor, W.-
dc.contributor.authorBonfond, B.-
dc.date.accessioned2023-10-20T06:48:45Z-
dc.date.available2023-10-20T06:48:45Z-
dc.date.issued2017-
dc.identifier.citationJournal of Geophysical Research: Space Physics, 2017, v. 122, n. 12, p. 12111-12119-
dc.identifier.issn2169-9380-
dc.identifier.urihttp://hdl.handle.net/10722/334523-
dc.description.abstractWe present Cassini auroral observations obtained on 11 November 2016 with the Ultraviolet Imaging Spectrograph at the beginning of the F-ring orbits and the Grand Finale phase of the mission. The spacecraft made a close approach to Saturn's southern pole and offered a remarkable view of the dayside and nightside aurora. With this sequence we identify, for the first time, the presence of dusk/midnight arcs, which are azimuthally spread from high to low latitudes, suggesting that their source region extends from the outer to middle/inner magnetosphere. The observed arcs could be auroral manifestations of plasma flows propagating toward the planet from the magnetotail, similar to terrestrial “auroral streamers.” During the sequence the dawn auroral region brightens and expands poleward. We suggest that the dawn auroral breakup results from a combination of plasma instability and global-scale magnetic field reconfiguration, which is initiated by plasma flows propagating toward the planet. Alternatively, the dawn auroral enhancement could be triggered by tail magnetic reconnection.-
dc.languageeng-
dc.relation.ispartofJournal of Geophysical Research: Space Physics-
dc.subjectaurora-
dc.subjectmagnetosphere-
dc.subjectSaturn-
dc.titleDawn Auroral Breakup at Saturn Initiated by Auroral Arcs: UVIS/Cassini Beginning of Grand Finale Phase-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/2017JA024653-
dc.identifier.scopuseid_2-s2.0-85040699400-
dc.identifier.volume122-
dc.identifier.issue12-
dc.identifier.spage12111-
dc.identifier.epage12119-
dc.identifier.eissn2169-9402-
dc.identifier.isiWOS:000422735500025-

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