Rings under close encounters with the giant planets: Chariklo versus Chiron

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dc.contributor.authorAraujo, R. A.N. [UNESP]
dc.contributor.authorWinter, O. C. [UNESP]
dc.contributor.authorSfair, R. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:38:09Z
dc.date.available2018-12-11T17:38:09Z
dc.date.issued2018-10-01
dc.description.abstractIn 2014, the discovery of two well-defined rings around the Centaur (10199) Chariklo was announced. This was the first time that such structures were found around a small body. In 2015, it was proposed that the Centaur (2060) Chiron may also have a ring. In a previous study, we analysed how close encounters with giant planets would affect the rings of Chariklo. The most likely result is the survival of the rings. In this work, we broaden our analysis to (2060) Chiron. In addition to Chariklo, Chiron is currently the only known Centaur with a presumed ring. By applying the same method as Araujo, Sfair and Winter, we performed numerical integrations of a system composed of 729 clones of Chiron, the Sun and the giant planets. The number of close encounters that disrupted the ring of Chiron during one half-life of the study period was computed. This number was then compared to the number of close encounters for Chariklo. We found that the probability of Chiron losing its ring due to close encounters with the giant planets is about six times higher than that for Chariklo. Our analysis showed that, unlike Chariklo, Chiron is more likely to remain in an orbit with a relatively low inclination and high eccentricity. Thus, we found that the bodies in Chiron-like orbits are less likely to retain rings than those in Chariklo-like orbits. Overall, for observational purposes, we conclude that the bigger bodies in orbits with high inclinations and low eccentricities should be prioritized.en
dc.description.affiliationUNESP - São Paulo State University Grupo de Dinâmica Orbital e Planetologia
dc.description.affiliationUnespUNESP - São Paulo State University Grupo de Dinâmica Orbital e Planetologia
dc.format.extent4770-4777
dc.identifierhttp://dx.doi.org/10.1093/mnras/sty1770
dc.identifier.citationMonthly Notices of the Royal Astronomical Society, v. 479, n. 4, p. 4770-4777, 2018.
dc.identifier.doi10.1093/mnras/sty1770
dc.identifier.file2-s2.0-85051488736.pdf
dc.identifier.issn1365-2966
dc.identifier.issn0035-8711
dc.identifier.scopus2-s2.0-85051488736
dc.identifier.urihttp://hdl.handle.net/11449/180101
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.relation.ispartofsjr2,346
dc.relation.ispartofsjr2,346
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectPlanets and satellites: dynamical evolution and stability
dc.subjectPlanets and satellites: rings
dc.titleRings under close encounters with the giant planets: Chariklo versus Chironen
dc.typeArtigo

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