N-body Models of Rotating Globular Clusters

Abstract

We have studied the dynamical evolution of rotating globular clusters with direct $N$-body models. Our initial models are rotating King models; we obtained results for both equal-mass systems and systems composed out of two mass components. Previous investigations using a Fokker-Planck solver have revealed that rotation has a noticeable influence on stellar systems like globular clusters, which evolve by two-body relaxation. In particular, it accelerates their dynamical evolution through the gravogyro instability. We have validated the occurence of the gravogyro instability with direct $N$-body models. In the case of systems composed out of two mass components, mass segregation takes place, which competes with the rotation in the acceleration of the core collapse. The "accelerating" effect of rotation has not been detected in our isolated two-mass $N$-body models. Last, but not least, we have looked at rotating $N$-body models in a tidal field within the tidal approximation. It turns out that rotation increases the escape rate significantly. A difference between retrograde and prograde rotating star clusters occurs with respect to the orbit of the star cluster around the Galaxy, which is due to the presence of a ``third integral'' and chaotic scattering, respectively.

16 pages, 17 figures, accepted by MNRAS

References in corpus (20)

• Internal Dynamics of Globular Clusters
• Formation of Massive Black Holes in Dense Star Clusters. I. Mass Segregation and Core Collapse
• The Evolution of Globular Clusters in the Galaxy
• The Time Scale of Escape from Star Clusters
• Statistics of N-body Simulations I. Equal Masess Before Core Collapse
• Scaling of N-body calculations
• Statistics of N-Body Simulations. III. Unequal Masses
• CFHT Adaptive Optics Observations of the Central Kinematics in M15
• The time-scale for core collapse in spherical star clusters
• A comprehensive Nbody study of mass segregation in star clusters: Energy equipartition and escape
• The orbits of 48 globular clusters in a Milky-Way-Like Barred Galaxy
• Dynamical evolution of rotating stellar systems - II. Post-collapse, equal mass system
• Statistics of N-Body Simulations. II. Equal Masses after Core Collapse
• Fabry-Perot Measurements of the Dynamics of Globular Cluster Cores: M15 (NGC~7078)
• Thermal and Dynamical Equilibrium in Two-Component Star Clusters
• Dynamical Evolution of Rotating Stellar Systems: III. The Effect of Mass Spectrum
• Radial velocities in the globular cluster omega Centauri
• 2D Fokker-Planck models of rotating clusters
• Evolution of Tidally Truncated Globular Clusters with Anisotropy
• The disruption of globular star clusters in the galaxy: A comparative analysis between Fokker-Planck and N-body models

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• On the dissolution of star clusters in the Galactic centre. I. Circular orbits
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