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Collisional Evolution of Galaxy Clusters: Fokker–Planck and N-body models

Published online by Cambridge University Press:  26 May 2016

Koji Takahashi ,
Tomohiro Sensui ,
Yoko Funato  and
Junichiro Makino
Koji Takahashi
Affiliation:
Department of Astronomy, School of Science, University of Tokyo, Tokyo 113-0033, Japan
Tomohiro Sensui
Affiliation:
Department of Astronomy, School of Science, University of Tokyo, Tokyo 113-0033, Japan
Yoko Funato
Affiliation:
General Systems Sciences, Graduate Division of International and Interdisciplinary Studies, University of Tokyo, Tokyo 153-8902, Japan
Junichiro Makino
Affiliation:
Department of Astronomy, School of Science, University of Tokyo, Tokyo 113-0033, Japan

Abstract

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We investigate the dynamical evolution of clusters of galaxies in virial equilibrium by using Fokker–Planck models and self-consistent N-body models. In particular we focus on the growth of the common halos and the development of the central density cusps in the clusters. We find good agreement between the Fokker–Planck and N-body models. At the cluster center the cusp approximated by a power law, ρ(r) ∝ r-α (α ∼ 1), develops. We conclude that this shallow cusp results from the combined effects of two-body relaxation and tidal stripping. The cusp steepness α weakly depends on the relative importance of tidal stripping.

Type
Posters
Information
Symposium - International Astronomical Union , Volume 208: Astrophysical Supercomputing using Particle Simulations , 2003 , pp. 449 - 450
Copyright
Copyright © Astronomical Society of the Pacific 2003 

References

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