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Article: Reconnection Acceleration in Saturn's Dayside Magnetodisk: A Multicase Study with Cassini

TitleReconnection Acceleration in Saturn's Dayside Magnetodisk: A Multicase Study with Cassini
Authors
Keywordsacceleration of particles
magnetic reconnection
planetary systems
Issue Date2018
Citation
Astrophysical Journal Letters, 2018, v. 868, n. 2, article no. L23 How to Cite?
AbstractRecently, rotationally driven magnetic reconnection was first discovered in Saturn's dayside magnetosphere. This newly confirmed process could potentially drive bursty phenomena at Saturn, i.e., pulsating energetic particles and auroral emissions. Using Cassini's measurements of magnetic fields and charged particles, we investigate particle acceleration features during three magnetic reconnection events observed in Saturn's dayside magnetodisk. The results suggest that the rotationally driven reconnection process plays a key role in producing energetic electrons (up to 100 keV) and ions (several hundreds of kiloelectron volts). In particular, we find that energetic oxygen ions are locally accelerated at all three reconnection sites. Isolated, multiple reconnection sites were recorded in succession during an interval lasting for much less than one Saturn rotation period. Moreover, a secondary magnetic island is reported for the first time at the dayside, collectively suggesting that the reconnection process is not steady and could be "drizzle-like." This study demonstrates the fundamental importance of internally driven magnetic reconnection in accelerating particles in Saturn's dayside magnetosphere, and likewise in the rapidly rotating Jovian magnetosphere and beyond.
Persistent Identifierhttp://hdl.handle.net/10722/334568
ISSN
2023 Impact Factor: 8.8
2023 SCImago Journal Rankings: 2.766
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorGuo, R. L.-
dc.contributor.authorYao, Z. H.-
dc.contributor.authorSergis, N.-
dc.contributor.authorWei, Y.-
dc.contributor.authorMitchell, D.-
dc.contributor.authorRoussos, E.-
dc.contributor.authorPalmaerts, B.-
dc.contributor.authorDunn, W. R.-
dc.contributor.authorRadioti, A.-
dc.contributor.authorRay, L. C.-
dc.contributor.authorCoates, A. J.-
dc.contributor.authorGrodent, D.-
dc.contributor.authorArridge, C. S.-
dc.contributor.authorKollmann, P.-
dc.contributor.authorKrupp, N.-
dc.contributor.authorWaite, J. H.-
dc.contributor.authorDougherty, M. K.-
dc.contributor.authorBurch, J. L.-
dc.contributor.authorWan, W. X.-
dc.date.accessioned2023-10-20T06:49:04Z-
dc.date.available2023-10-20T06:49:04Z-
dc.date.issued2018-
dc.identifier.citationAstrophysical Journal Letters, 2018, v. 868, n. 2, article no. L23-
dc.identifier.issn2041-8205-
dc.identifier.urihttp://hdl.handle.net/10722/334568-
dc.description.abstractRecently, rotationally driven magnetic reconnection was first discovered in Saturn's dayside magnetosphere. This newly confirmed process could potentially drive bursty phenomena at Saturn, i.e., pulsating energetic particles and auroral emissions. Using Cassini's measurements of magnetic fields and charged particles, we investigate particle acceleration features during three magnetic reconnection events observed in Saturn's dayside magnetodisk. The results suggest that the rotationally driven reconnection process plays a key role in producing energetic electrons (up to 100 keV) and ions (several hundreds of kiloelectron volts). In particular, we find that energetic oxygen ions are locally accelerated at all three reconnection sites. Isolated, multiple reconnection sites were recorded in succession during an interval lasting for much less than one Saturn rotation period. Moreover, a secondary magnetic island is reported for the first time at the dayside, collectively suggesting that the reconnection process is not steady and could be "drizzle-like." This study demonstrates the fundamental importance of internally driven magnetic reconnection in accelerating particles in Saturn's dayside magnetosphere, and likewise in the rapidly rotating Jovian magnetosphere and beyond.-
dc.languageeng-
dc.relation.ispartofAstrophysical Journal Letters-
dc.subjectacceleration of particles-
dc.subjectmagnetic reconnection-
dc.subjectplanetary systems-
dc.titleReconnection Acceleration in Saturn's Dayside Magnetodisk: A Multicase Study with Cassini-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.3847/2041-8213/aaedab-
dc.identifier.scopuseid_2-s2.0-85057881424-
dc.identifier.volume868-
dc.identifier.issue2-
dc.identifier.spagearticle no. L23-
dc.identifier.epagearticle no. L23-
dc.identifier.eissn2041-8213-
dc.identifier.isiWOS:000450844500007-

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