A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood

Autores
Correa Otto, J. A.; Calandra, María Florencia; Gil-Hutton, Ricardo
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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.
Facultad de Ciencias Astronómicas y Geofísicas
Materia
Ciencias Astronómicas
galaxies: kinematics and dynamics
binaries: general
solar neighborhood
methods: analytical
methods: numerical
planets and satellites: dynamical evolution and stability
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc-sa/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/87501

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network_name_str SEDICI (UNLP)
spelling A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhoodCorrea Otto, J. A.Calandra, María FlorenciaGil-Hutton, RicardoCiencias Astronómicasgalaxies: kinematics and dynamicsbinaries: generalsolar neighborhoodmethods: analyticalmethods: numericalplanets and satellites: dynamical evolution and stabilityContext. 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.Facultad de Ciencias Astronómicas y Geofísicas2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/87501enginfo:eu-repo/semantics/altIdentifier/issn/0004-6361info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201629679info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc-sa/4.0/Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:17:14Zoai:sedici.unlp.edu.ar:10915/87501Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:17:15.162SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
title A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
spellingShingle A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
Correa Otto, J. A.
Ciencias Astronómicas
galaxies: kinematics and dynamics
binaries: general
solar neighborhood
methods: analytical
methods: numerical
planets and satellites: dynamical evolution and stability
title_short A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
title_full A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
title_fullStr A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
title_full_unstemmed A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
title_sort A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
dc.creator.none.fl_str_mv Correa Otto, J. A.
Calandra, María Florencia
Gil-Hutton, Ricardo
author Correa Otto, J. A.
author_facet Correa Otto, J. A.
Calandra, María Florencia
Gil-Hutton, Ricardo
author_role author
author2 Calandra, María Florencia
Gil-Hutton, Ricardo
author2_role author
author
dc.subject.none.fl_str_mv Ciencias Astronómicas
galaxies: kinematics and dynamics
binaries: general
solar neighborhood
methods: analytical
methods: numerical
planets and satellites: dynamical evolution and stability
topic Ciencias Astronómicas
galaxies: kinematics and dynamics
binaries: general
solar neighborhood
methods: analytical
methods: numerical
planets and satellites: dynamical evolution and stability
dc.description.none.fl_txt_mv 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.
Facultad de Ciencias Astronómicas y Geofísicas
description 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.
publishDate 2017
dc.date.none.fl_str_mv 2017
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info:eu-repo/semantics/publishedVersion
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dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/0004-6361
info:eu-repo/semantics/altIdentifier/doi/10.1051/0004-6361/201629679
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc-sa/4.0/
Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc-sa/4.0/
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