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dc.contributor.author
Giuppone, Cristian Andrés
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dc.contributor.author
Rodríguez, Adrián
dc.contributor.author
Michtchenko, Tatiana A.
dc.contributor.author
De Almeida, Amaury A.
dc.date.available
2023-07-10T13:22:02Z
dc.date.issued
2022-02
dc.identifier.citation
Giuppone, Cristian Andrés; Rodríguez, Adrián; Michtchenko, Tatiana A.; De Almeida, Amaury A.; Past and present dynamics of the circumbinary moons in the Pluto-Charon system; EDP Sciences; Astronomy and Astrophysics; 658; A99; 2-2022; 1-19
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/202885
dc.description.abstract
Context. The Pluto-Charon (PC) pair is usually thought of as a binary in a dual synchronous state, which is the endpoint of its tidal evolution. The discovery of the small circumbinary moons, Styx, Nix, Kerberos, and Hydra, placed close to the mean motion resonances (MMRs) 3/1, 4/1, 5/1, and 6/1 with Charon, respectively, reveals a complex dynamical system architecture. Several formation mechanisms for the PC system have been proposed. Aims. Assuming the hypothesis of an in situ formation of the moons, our goal is to analyse the past and current orbital dynamics of the satellite system. We plan to elucidate on in which scenario the small moons can survive a rapid tidal expansion of the PC binary. Methods. We study the past and current dynamics of the PC system through a large set of numerical integrations of the exact equations of motion, accounting for the gravitational interactions of the PC binary with the small moons and the tidal evolution, modelled by the constant time lag approach. We construct stability maps in a pseudo-Jacobian coordinate system. In addition, considering a more realistic model that accounts for the zonal harmonic, J2, of Pluto's oblateness and the ad hoc accreting mass of Charon, we investigate the tidal evolution of the whole system. Results. Our results show that, in the chosen reference frame, the current orbits of all satellites are nearly circular, nearly planar, and nearly resonant with Charon, which can be seen as an indicator of the convergent dissipative migration experienced by the system in the past. We verify that, under the assumption that Charon completes its formation during the tidal expansion, the moons can safely cross the main MMRs without their motions being strongly excited and consequently ejected. Conclusions. In the more realistic scenario proposed here, the small moons survive the tidal expansion of the PC binary without the hypothesis of resonant transport having to be invoked. Our results indicate that the possibility of finding additional small moons in the PC system cannot be ruled out.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
CELESTIAL MECHANICS
dc.subject
METHODS: NUMERICAL
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PLANETS AND SATELLITES: DYNAMICAL EVOLUTION AND STABILITY
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PLANETS AND SATELLITES: INDIVIDUAL: PLUTO
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Past and present dynamics of the circumbinary moons in the Pluto-Charon system
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-06T11:33:21Z
dc.journal.volume
658
dc.journal.number
A99
dc.journal.pagination
1-19
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
dc.description.fil
Fil: Giuppone, Cristian Andrés. Universidad Nacional de Córdoba; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Córdoba. Instituto de Astronomía Teórica y Experimental. Universidad Nacional de Córdoba. Observatorio Astronómico de Córdoba. Instituto de Astronomía Teórica y Experimental; Argentina
dc.description.fil
Fil: Rodríguez, Adrián. Universidade Federal do Rio de Janeiro; Brasil
dc.description.fil
Fil: Michtchenko, Tatiana A.. Universidade de Sao Paulo; Brasil
dc.description.fil
Fil: De Almeida, Amaury A.. Universidade de Sao Paulo; Brasil
dc.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/202141687
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2022/02/aa41687-21/aa41687-21.html
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/arxiv/https://arxiv.org/abs/2112.11972
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