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

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 nei...

Descripción completa

Guardado en:

Detalles Bibliográficos
Autores principales:	Correa Otto, J. A., Calandra, María Florencia, Gil-Hutton, Ricardo
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2017
Materias:	Ciencias Astronómicas galaxies: kinematics and dynamics binaries: general solar neighborhood methods: analytical methods: numerical planets and satellites: dynamical evolution and stability
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/87501
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-87501
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Ciencias Astronómicas galaxies: kinematics and dynamics binaries: general solar neighborhood methods: analytical methods: numerical planets and satellites: dynamical evolution and stability
spellingShingle	Ciencias Astronómicas galaxies: kinematics and dynamics binaries: general solar neighborhood methods: analytical methods: numerical planets and satellites: dynamical evolution and stability Correa Otto, J. A. Calandra, María Florencia Gil-Hutton, Ricardo A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
topic_facet	Ciencias Astronómicas galaxies: kinematics and dynamics binaries: general solar neighborhood methods: analytical methods: numerical planets and satellites: dynamical evolution and stability
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.
format	Articulo Articulo
author	Correa Otto, J. A. Calandra, María Florencia Gil-Hutton, Ricardo
author_facet	Correa Otto, J. A. Calandra, María Florencia Gil-Hutton, Ricardo
author_sort	Correa Otto, J. A.
title	A new insight into the Galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
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	new insight into the galactic potential: a simple secular model for the evolution of binary systems in the solar neighbourhood
publishDate	2017
url	http://sedici.unlp.edu.ar/handle/10915/87501
work_keys_str_mv	AT correaottoja anewinsightintothegalacticpotentialasimplesecularmodelfortheevolutionofbinarysystemsinthesolarneighbourhood AT calandramariaflorencia anewinsightintothegalacticpotentialasimplesecularmodelfortheevolutionofbinarysystemsinthesolarneighbourhood AT gilhuttonricardo anewinsightintothegalacticpotentialasimplesecularmodelfortheevolutionofbinarysystemsinthesolarneighbourhood AT correaottoja newinsightintothegalacticpotentialasimplesecularmodelfortheevolutionofbinarysystemsinthesolarneighbourhood AT calandramariaflorencia newinsightintothegalacticpotentialasimplesecularmodelfortheevolutionofbinarysystemsinthesolarneighbourhood AT gilhuttonricardo newinsightintothegalacticpotentialasimplesecularmodelfortheevolutionofbinarysystemsinthesolarneighbourhood
bdutipo_str	Repositorios
_version_	1764820490128457732

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

Ejemplares similares