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dc.contributor.author
Correa Otto, Jorge Alfredo
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dc.contributor.author
Calandra, Maria Florencia
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dc.contributor.author
Gil Hutton, Ricardo Alfredo
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dc.date.available
2018-09-28T15:00:58Z
dc.date.issued
2017-04
dc.identifier.citation
Correa Otto, Jorge Alfredo; Calandra, Maria Florencia; Gil Hutton, Ricardo Alfredo; A new insight into the Galactic potential: A simple secular model for the evolution of binary systems in the solar neighbourhood; EDP Sciences; Astronomy and Astrophysics; 600; 4-2017; 1-15
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/61197
dc.description.abstract
Context. Among the main effects that the Milky Way exerts in binary systems, the Galactic tide is the only one that is not probabilistic and can be deduced from a potential. Therefore, it is possible to perform an analysis of the global structure of the phase space of binary systems in the solar neighbourhood using the Galactic potential. Aims. The aim of this work is to obtain a simple model to study the collisionless dynamical evolution of generic wide binaries systems in the solar neighbourhood. Methods. Through an averaging process, we reduced the three-dimensional potential of the Galaxy to a secular one-degree of freedom model. The accuracy of this model was tested by comparing its predictions with numerical simulations of the exact equations of motion of a two-body problem disturbed by the Galaxy. Results. Using the one-degree of freedom model, we developed a detailed dynamical study, finding that the secular Galactic tide period changes as a function of the separation of the pair, which also gives a dynamical explanation for the arbitrary classification between wide and tight binaries. Moreover, the secular phase space for a generic gravitationally bound pair is similar to the dynamical structure of a Lidov-Kozai resonance, but surprisingly this structure is independent of the masses and semimajor axis of the binary system. Thus, the Galactic potential is able to excite the initially circular orbit of binary systems to high values of eccentricity, which has important implications for studies of binary star systems (with and without exoplanets), comets, and Oort cloud objects.
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
Galaxy: Kinematics And Dynamics
dc.subject
Stars: Binaries
dc.subject
(Galaxy:) Solar Neighbourhood
dc.subject
Methods: Analytical
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
A new insight into the Galactic potential: A simple secular model for the evolution of binary systems in the solar neighbourhood
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-09-27T20:15:10Z
dc.journal.volume
600
dc.journal.pagination
1-15
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
dc.description.fil
Fil: Correa Otto, Jorge Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina
dc.description.fil
Fil: Calandra, Maria Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
dc.description.fil
Fil: Gil Hutton, Ricardo Alfredo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas, Físicas y Naturales. Departamento de Geofísica y Astronomía; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Complejo Astronómico ; Argentina
dc.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1051/0004-6361/201629679
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2017/04/aa29679-16/aa29679-16.html
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