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dc.contributor.author
Giuppone, Cristian Andrés
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dc.contributor.author
Roig, F.
dc.contributor.author
Saad Olivera, Ximena Beatriz
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dc.date.available
2021-05-19T21:27:48Z
dc.date.issued
2018-12
dc.identifier.citation
Giuppone, Cristian Andrés; Roig, F.; Saad Olivera, Ximena Beatriz; Modeling the evection resonance for trojan satellites: Application to the saturn system; EDP Sciences; Astronomy and Astrophysics; 620; 12-2018; 1-13
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/132297
dc.description.abstract
The stability of satellites in the solar system is affected by the so-called evection resonance. The moons of Saturn, in particular, exhibit a complex dynamical architecture in which co-orbital configurations occur, especially close to the planet where this resonance is present. Aims. We address the dynamics of the evection resonance, with particular focus on the Saturn system, and compare the known behavior of the resonance for a single moon with that of a pair of moons in co-orbital Trojan configuration. Methods. We developed an analytic expansion of the averaged Hamiltonian of a Trojan pair of bodies, including the perturbation from a distant massive body. The analysis of the corresponding equilibrium points was restricted to the asymmetric apsidal corotation solution of the co-orbital dynamics. We also performed numerical N-body simulations to construct dynamical maps of the stability of the evection resonance in the Saturn system, and to study the effects of this resonance under the migration of Trojan moons caused by tidal dissipation. Results. The structure of the phase space of the evection resonance for Trojan satellites is similar to that of a single satellite, differing in that the libration centers are displaced from their standard positions by an angle that depends on the periastron difference Ï- 2 -Ï- 1 and on the mass ratio m2m1 of the Trojan pair. In the Saturn system, the inner evection resonance, located at ∼8 RS, may capture a pair of Trojan moons by migration; the stability of the captured system depends on the assumed values of the dissipation factor Q of the moons. On the other hand, the outer evection resonance, located at >0.4 RHill, cannot exist at all for Trojan moons, because Trojan configurations are strongly unstable at distances from Saturn longer than ~0.15 RHill. Conclusions. The interaction with the inner evection resonance may have been relevant during the early evolution of the Saturn moons Tethys, Dione, and Rhea. In particular, Rhea may have had Trojan companions in the past that were lost when it crossed the evection resonance, while Tethys and Dione may either have retained their Trojans or have never crossed the evection. This may help to constrain the dynamical processes that led to the migration of these satellites and to the evection itself.
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-nc-sa/2.5/ar/
dc.subject
CELESTIAL MECHANICS
dc.subject
METHODS: ANALYTICAL
dc.subject
METHODS: NUMERICAL
dc.subject
PLANETS AND SATELLITES: DYNAMICAL EVOLUTION AND STABILITY
dc.subject
PLANETS AND SATELLITES: INDIVIDUAL: SATURN
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
Modeling the evection resonance for trojan satellites: Application to the saturn 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
2021-04-23T16:44:00Z
dc.identifier.eissn
1432-0746
dc.journal.volume
620
dc.journal.pagination
1-13
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
dc.description.fil
Fil: Giuppone, Cristian Andrés. Universidad Nacional de Córdoba. Observatorio Astronómico 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: Roig, F.. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; Brasil
dc.description.fil
Fil: Saad Olivera, Ximena Beatriz. Ministerio de Ciencia, Tecnología E Innovacao. Observatorio Nacional. Departamento Astronomia y Astrofísica; Brasil
dc.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1051/0004-6361/201833735
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/full_html/2018/12/aa33735-18/aa33735-18.html
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