A Universal Density Profile from Hierarchical Clustering

  title={A Universal Density Profile from Hierarchical Clustering},
  author={Julio F. Navarro and Carlos S. Frenk and Simon D. M. White},
  journal={The Astrophysical Journal},
  pages={493 - 508}
We use high-resolution N-body simulations to study the equilibrium density profiles of dark matter halos in hierarchically clustering universes. We find that all such profiles have the same shape, independent of the halo mass, the initial density fluctuation spectrum, and the values of the cosmological parameters. Spherically averaged equilibrium profiles are well fitted over two decades in radius by a simple formula originally proposed to describe the structure of galaxy clusters in a cold… 

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