Simulating clusters of galaxies: a brief history of `N' and overmerging

Details Simulating clusters of galaxies: a brief history of `N' and overmerging Simulating clusters of galaxies: a brief history of `N' and overmerging

2000-09-15

arxiv.org/abs/astro-ph/0009247v1

Astronomy and Astrophysics

Astrophysics

Invited review, IAP2000

Scientific paper

I review four decades of numerical simulations of galaxy clusters focussing on the attempts to resolve their internal structure. Overmerging describes the numerical or physical disruption of dark matter halos within dense environments. This problem was inherent in simulations prior to 1998 but can be completely overcome with current algorithms and hardware. We can now resolve many thousands of subhalos within clusters and we may have converged on their inner structure, allowing several new tests of the hierarchical structure formation model and the nature of dark matter.

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