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Article: Mechanisms of Saturn's Near-Noon Transient Aurora: In Situ Evidence From Cassini Measurements

TitleMechanisms of Saturn's Near-Noon Transient Aurora: In Situ Evidence From Cassini Measurements
Authors
Keywordsaurora
Cassini
field-aligned current
plasma wave
Saturn
Issue Date2017
Citation
Geophysical Research Letters, 2017, v. 44, n. 22, p. 11,217-11,228 How to Cite?
AbstractAlthough auroral emissions at giant planets have been observed for decades, the physical mechanisms of aurorae at giant planets remain unclear. One key reason is the lack of simultaneous measurements in the magnetosphere while remote sensing of the aurora. We report a dynamic auroral event identified with the Cassini Ultraviolet Imaging Spectrograph (UVIS) at Saturn on 13 July 2008 with coordinated measurements of the magnetic field and plasma in the magnetosphere. The auroral intensification was transient, only lasting for ∼30 min. The magnetic field and plasma are perturbed during the auroral intensification period. We suggest that this intensification was caused by wave mode conversion generated field-aligned currents, and we propose two potential mechanisms for the generation of this plasma wave and the transient auroral intensification. A survey of the Cassini UVIS database reveals that this type of transient auroral intensification is very common (10/11 time sequences, and ∼10% of the total images).
Persistent Identifierhttp://hdl.handle.net/10722/334514
ISSN
2023 Impact Factor: 4.6
2023 SCImago Journal Rankings: 1.850
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYao, Z. H.-
dc.contributor.authorRadioti, A.-
dc.contributor.authorRae, I. J.-
dc.contributor.authorLiu, J.-
dc.contributor.authorGrodent, D.-
dc.contributor.authorRay, L. C.-
dc.contributor.authorBadman, S. V.-
dc.contributor.authorCoates, A. J.-
dc.contributor.authorGérard, J. C.-
dc.contributor.authorWaite, J. H.-
dc.contributor.authorYates, J. N.-
dc.contributor.authorShi, Q. Q.-
dc.contributor.authorWei, Y.-
dc.contributor.authorBonfond, B.-
dc.contributor.authorDougherty, M. K.-
dc.contributor.authorRoussos, E.-
dc.contributor.authorSergis, N.-
dc.contributor.authorPalmaerts, B.-
dc.date.accessioned2023-10-20T06:48:41Z-
dc.date.available2023-10-20T06:48:41Z-
dc.date.issued2017-
dc.identifier.citationGeophysical Research Letters, 2017, v. 44, n. 22, p. 11,217-11,228-
dc.identifier.issn0094-8276-
dc.identifier.urihttp://hdl.handle.net/10722/334514-
dc.description.abstractAlthough auroral emissions at giant planets have been observed for decades, the physical mechanisms of aurorae at giant planets remain unclear. One key reason is the lack of simultaneous measurements in the magnetosphere while remote sensing of the aurora. We report a dynamic auroral event identified with the Cassini Ultraviolet Imaging Spectrograph (UVIS) at Saturn on 13 July 2008 with coordinated measurements of the magnetic field and plasma in the magnetosphere. The auroral intensification was transient, only lasting for ∼30 min. The magnetic field and plasma are perturbed during the auroral intensification period. We suggest that this intensification was caused by wave mode conversion generated field-aligned currents, and we propose two potential mechanisms for the generation of this plasma wave and the transient auroral intensification. A survey of the Cassini UVIS database reveals that this type of transient auroral intensification is very common (10/11 time sequences, and ∼10% of the total images).-
dc.languageeng-
dc.relation.ispartofGeophysical Research Letters-
dc.subjectaurora-
dc.subjectCassini-
dc.subjectfield-aligned current-
dc.subjectplasma wave-
dc.subjectSaturn-
dc.titleMechanisms of Saturn's Near-Noon Transient Aurora: In Situ Evidence From Cassini Measurements-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1002/2017GL075108-
dc.identifier.scopuseid_2-s2.0-85034229188-
dc.identifier.volume44-
dc.identifier.issue22-
dc.identifier.spage11,217-
dc.identifier.epage11,228-
dc.identifier.eissn1944-8007-
dc.identifier.isiWOS:000419102300001-

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