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Cassini observations of Saturn’s southern polar cusp

dc.contributor.authorArridge, C. S.
dc.contributor.authorJasinski, J. M.
dc.contributor.authorAchilleos, N.
dc.contributor.authorBogdanova, Y. V.
dc.contributor.authorBunce, E. J.
dc.contributor.authorCowley, S. W. H.
dc.contributor.authorFazakerley, A. N.
dc.contributor.authorKhurana, K. K.
dc.contributor.authorLamy, L.
dc.contributor.authorLeisner, J. S.
dc.contributor.authorRoussos, E.
dc.contributor.authorRussell, C. T.
dc.contributor.authorZarka, P.
dc.contributor.authorCoates, A. J.
dc.contributor.authorDougherty, M. K.
dc.contributor.authorJones, G. H.
dc.contributor.authorKrimigis, S. M.
dc.contributor.authorKrupp, N.
dc.date.accessioned2017-06-16T20:08:17Z
dc.date.available2017-06-16T20:08:17Z
dc.date.issued2016-04
dc.identifier.citationArridge, C. S.; Jasinski, J. M.; Achilleos, N.; Bogdanova, Y. V.; Bunce, E. J.; Cowley, S. W. H.; Fazakerley, A. N.; Khurana, K. K.; Lamy, L.; Leisner, J. S.; Roussos, E.; Russell, C. T.; Zarka, P.; Coates, A. J.; Dougherty, M. K.; Jones, G. H.; Krimigis, S. M.; Krupp, N. (2016). "Cassini observations of Saturn’s southern polar cusp." Journal of Geophysical Research: Space Physics 121(4): 3006-3030.
dc.identifier.issn2169-9380
dc.identifier.issn2169-9402
dc.identifier.urihttps://hdl.handle.net/2027.42/137234
dc.description.abstractThe magnetospheric cusps are important sites of the coupling of a magnetosphere with the solar wind. The combination of both ground‐ and space‐based observations at Earth has enabled considerable progress to be made in understanding the terrestrial cusp and its role in the coupling of the magnetosphere to the solar wind via the polar magnetosphere. Voyager 2 fully explored Neptune’s cusp in 1989, but highly inclined orbits of the Cassini spacecraft at Saturn present the most recent opportunity to repeatedly study the polar magnetosphere of a rapidly rotating planet. In this paper we discuss observations made by Cassini during two passes through Saturn’s southern polar magnetosphere. Our main findings are that (i) Cassini directly encounters the southern polar cusp with evidence for the entry of magnetosheath plasma into the cusp via magnetopause reconnection, (ii) magnetopause reconnection and entry of plasma into the cusp can occur over a range of solar wind conditions, and (iii) double cusp morphologies are consistent with the position of the cusp oscillating in phase with Saturn’s global magnetospheric periodicities.Key PointsSaturn’s southern polar cusp is active under a range of solar wind conditionsEvidence for injection of magnetosheath plasma into the cusp via dayside magnetopause reconnectionThe position of Saturn’s southern polar cusp oscillates in with global magnetospheric periodicities
dc.publisherAstronomical Society of the Pacific
dc.publisherWiley Periodicals, Inc.
dc.subject.otherperiodicity
dc.subject.othercusp
dc.subject.otherSaturn
dc.titleCassini observations of Saturn’s southern polar cusp
dc.typeArticleen_US
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelAstronomy and Astrophysics
dc.subject.hlbtoplevelScience
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/137234/1/jgra52431_am.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/137234/2/jgra52431.pdf
dc.identifier.doi10.1002/2015JA021957
dc.identifier.sourceJournal of Geophysical Research: Space Physics
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