THE RINGS of CHARIKLO under CLOSE ENCOUNTERS with the GIANT PLANETS

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dc.contributor.authorAraujo, R. A.N. [UNESP]
dc.contributor.authorSfair, R. [UNESP]
dc.contributor.authorWinter, O. C. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2018-12-11T17:28:57Z
dc.date.available2018-12-11T17:28:57Z
dc.date.issued2016-06-20
dc.description.abstractThe Centaur population is composed of minor bodies wandering between the giant planets that frequently perform close gravitational encounters with these planets, leading to a chaotic orbital evolution. Recently, the discovery of two well-defined narrow rings was announced around the Centaur 10199 Chariklo. The rings are assumed to be in the equatorial plane of Chariklo and to have circular orbits. The existence of a well-defined system of rings around a body in such a perturbed orbital region poses an interesting new problem. Are the rings of Chariklo stable when perturbed by close gravitational encounters with the giant planets? Our approach to address this question consisted of forward and backward numerical simulations of 729 clones of Chariklo, with similar initial orbits, for a period of 100 Myr. We found, on average, that each clone experiences during its lifetime more than 150 close encounters with the giant planets within one Hill radius of the planet in question. We identified some extreme close encounters that were able to significantly disrupt or disturb the rings of Chariklo. About 3% of the clones lose their rings and about 4% of the clones have their rings significantly disturbed. Therefore, our results show that in most cases (more than 90%), the close encounters with the giant planets do not affect the stability of the rings in Chariklo-like systems. Thus, if there is an efficient mechanism that creates the rings, then these structures may be common among these kinds of Centaurs.en
dc.description.affiliationUNESP - Univ. Estadual Paulista Grupo de Dinamica Orbital e Planetologia
dc.description.affiliationUnespUNESP - Univ. Estadual Paulista Grupo de Dinamica Orbital e Planetologia
dc.description.sponsorshipCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipIdCAPES: 2011/08171-3
dc.identifierhttp://dx.doi.org/10.3847/0004-637X/824/2/80
dc.identifier.citationAstrophysical Journal, v. 824, n. 2, 2016.
dc.identifier.doi10.3847/0004-637X/824/2/80
dc.identifier.file2-s2.0-84978194596.pdf
dc.identifier.issn1538-4357
dc.identifier.issn0004-637X
dc.identifier.scopus2-s2.0-84978194596
dc.identifier.urihttp://hdl.handle.net/11449/178144
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal
dc.relation.ispartofsjr2,684
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectAsteroids: individual (10199 Chariklo)
dc.subjectMinor planets
dc.subjectplanets and satellites: dynamical evolution and stability
dc.subjectplanets and satellites: rings
dc.titleTHE RINGS of CHARIKLO under CLOSE ENCOUNTERS with the GIANT PLANETSen
dc.typeArtigo
unesp.author.orcid0000-0001-5198-3025[1]

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