Periodic collisions between the moon Prometheus and Saturn's F ring

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dc.contributor.authorMurray, C. D.
dc.contributor.authorWinter, SMG
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T15:27:58Z
dc.date.available2014-05-20T15:27:58Z
dc.date.issued1996-03-14
dc.description.abstractSaturn's F ring, which lies 3,400 km beyond the edge of the main ring system, was discovered by the Pioneer 11 spacecraft(1) in 1979. It is a narrow, eccentric ring which shows an unusual 'braided' appearance in several Voyager 1 images' obtained in 1980, although it appears more regular in images from Voyager 2 obtained nine months later(3). The discovery of the moons Pandora and Prometheus orbiting on either side of the ring provided a partial explanation for some of the observed features(4). Recent observations of Prometheus(5,6) by the Hubble Space Telescope show, surprisingly, that it is lagging behind its expected position by similar to 20 degrees. By modelling the dynamical evolution of the entire Prometheus-F ring-Pandora system, we show here that Prometheus probably encountered the core of the F ring in 1994 and that it may still be entering parts of the ring once per orbit. Collisions with objects in the F ring provide a plausible explanation for the observed lag and imply that the mass of the F ring is probably less than 25% that of Prometheus.en
dc.description.affiliationUNESP,DEPT MATEMAT,GRP DINAM ORBITAL & PLANETOL,BR-12500000 GUARATINGUETA,SP,BRAZIL
dc.description.affiliationUnespUNESP,DEPT MATEMAT,GRP DINAM ORBITAL & PLANETOL,BR-12500000 GUARATINGUETA,SP,BRAZIL
dc.format.extent139-141
dc.identifierhttp://dx.doi.org/10.1038/380139a0
dc.identifier.citationNature. London: Macmillan Magazines Ltd, v. 380, n. 6570, p. 139-141, 1996.
dc.identifier.doi10.1038/380139a0
dc.identifier.issn0028-0836
dc.identifier.lattes9224861533404236
dc.identifier.urihttp://hdl.handle.net/11449/37883
dc.identifier.wosWOS:A1996TZ97800043
dc.language.isoeng
dc.publisherMacmillan Magazines Ltd
dc.relation.ispartofNature
dc.relation.ispartofjcr41.577
dc.relation.ispartofsjr17,875
dc.rights.accessRightsAcesso restrito
dc.sourceWeb of Science
dc.titlePeriodic collisions between the moon Prometheus and Saturn's F ringen
dc.typeArtigo
dcterms.licensehttp://www.nature.com/authors/policies/embargo.html
dcterms.rightsHolderMacmillan Magazines Ltd
unesp.author.lattes9224861533404236
unesp.campusUniversidade Estadual Paulista (Unesp), Faculdade de Engenharia, Guaratinguetápt

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Artigos - Matemática - FEG