Orbital structure in barred spiral galaxies

Abstract

We study the orbital structure in a series of self-consistent $N$-body configurations simulating rotating barred galaxies with spiral and ring structures. We perform frequency analysis in order to measure the angular and the radial frequencies of the orbits at two different time snapshots during the evolution of each $N$-body system. The analysis is done separately for the regular and the chaotic orbits. We thereby identify the various types of orbits, determine the shape and percentages of the orbits supporting the bar and the ring/spiral structures, and study how the latter quantities change during the secular evolution of each system. Although the frequency maps of the chaotic orbits are scattered, we can still identify concentrations around resonances. We give the distributions of frequencies of the most important populations of orbits. We explore the phase space structure of each system using projections of the 4D surfaces of section. These are obtained via the numerical integration of the orbits of test particles, but also of the real $N$-body particles. We thus identify which domains of the phase space are preferred and which are avoided by the real particles. The chaotic orbits are found to play a major role in supporting the shape of the outer envelope of the bar as well as the rings and the spiral arms formed outside corotation.

15 pages, 20 figures

References in corpus (21)

• What determines the strength and the slowdown rate of bars ?
• Evolution of Stellar Bars in Live Axisymmetric Halos: Recurrent Buckling and Secular Growth
• The Destruction of Bars by Central Mass Concentrations
• Orbital dynamics of three-dimensional bars: I. The backbone of 3D bars. A fiducial case
• The formation of spiral arms and rings in barred galaxies
• On the Formation of Boxy and Disky Elliptical Galaxies
• On the origin of rR_1 ring structures in barred galaxies
• Orbital dynamics of three-dimensional bars: II. Investigation of the parameter space
• Chaos caused by resonance overlap in the solar neighborhood -- Spiral structure at the Bar's 2:1 outer Lindblad resonance
• Resonances in Barred Galaxies
• The Evolution of Cuspy Triaxial Galaxies Harboring Central Black Holes
• Invariant manifolds, phase correlations of chaotic orbits and the spiral structure of galaxies
• Chaotic motion and spiral structure in self-consistent models of rotating galaxies
• Stickiness in Chaos
• Models of Cuspy Triaxial Galaxies
• Stellar Bar Evolution in Cuspy and Flat-Cored Triaxial CDM Halos
• Orbital dynamics of three-dimensional bars: IV. Boxy isophotes in face-on views
• The coalescence of invariant manifolds and the spiral structure of barred galaxies
• Line-of-sight velocity distributions of elliptical galaxies from collisionless mergers
• On the 3D dynamics and morphology of inner rings
• Populating Stellar Orbits Inside a Rotating, Gaseous Bar

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