Tails and bridges in the parabolic restricted three-body problem

Abstract After a close encounter of two galaxies, bridges and tails can be seen between or around them. A bridge would be a spiral arm between a galaxy and its companion, whereas a tail would correspond to a long and curving set of debris escaping from the galaxy. The goal of this paper is to presen...

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Veröffentlicht in:Monthly notices of the Royal Astronomical Society Jg. 472; H. 3; S. 2554 - 2568
Hauptverfasser: Barrabés, Esther, Cors, Josep M., Garcia-Taberner, Laura, Ollé, Mercè
Format: Journal Article Verlag
Sprache:Englisch
Veröffentlicht: London Oxford University Press 11.12.2017
Schlagworte:
70 Mechanics of particles and systems
70F Dynamics of a system of particles, including celestial mechanics
Bridges
Celestial mechanics
Chaos theory
Classificació AMS
Collision dynamics
Computer simulation
Dynamic systems theory
Galaxies
Galaxies: interactions
Galàxies
Manifolds
Matemàtiques i estadística
Mathematical models
Mecànica celest
Methods: numerical
Orbits
Parabola
Paràbola (Geometria)
Problema dels tres cossos
Stars & galaxies
System theory
Three body problem
Àrees temàtiques de la UPC
Òrbites
methods: numerical
galaxies: interactions
celestial mechanics
ISSN:0035-8711, 1365-2966
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Zusammenfassung:Abstract After a close encounter of two galaxies, bridges and tails can be seen between or around them. A bridge would be a spiral arm between a galaxy and its companion, whereas a tail would correspond to a long and curving set of debris escaping from the galaxy. The goal of this paper is to present a mechanism, applying techniques of dynamical systems theory, that explains the formation of tails and bridges between galaxies in a simple model, the so-called parabolic restricted three-body problem, i.e. we study the motion of a particle under the gravitational influence of two primaries describing parabolic orbits. The equilibrium points and the final evolutions in this problem are recalled,and we show that the invariant manifolds of the collinear equilibrium points and the ones of the collision manifold explain the formation of bridges and tails. Massive numerical simulations are carried out and their application to recover previous results are also analysed.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stx1990