Comparative study between N-body and Fokker-Planck simulations for rotating star clusters: I. Equal-mass system

Abstract

We have carried out N-body simulations for rotating star clusters with equal mass and compared the results with Fokker-Planck models. These two different approaches are found to produce fairly similar results, although there are some differences with regard to the detailed aspects. We confirmed the acceleration of the core collapse of a cluster due to an initial non-zero angular momentum and found a similar evolutionary trend in the central density and velocity dispersion in both simulations. The degree of acceleration depends on the initial angular momentum. Angular momentum is being lost from the cluster due to the evaporation of stars with a large angular momentum on a relaxation time scale.

11 pages, 13 eps figures, accepted for the publication of MNRAS

References in corpus (4)

• Performance Analysis of Direct N-Body Algorithms on Special-Purpose Supercomputers
• A comprehensive Nbody study of mass segregation in star clusters: Energy equipartition and escape
• N-body Models of Rotating Globular Clusters
• 2D Fokker-Planck models of rotating clusters

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