A universal model for halo concentrations

  title={A universal model for halo concentrations},
  author={Benedikt Diemer and Andrey V. Kravtsov},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
We present a numerical study of dark matter halo concentrations in $\Lambda$CDM and self-similar cosmologies. We show that the relation between concentration, $c$, and peak height, $\nu$, exhibits the smallest deviations from universality if halo masses are defined with respect to the critical density of the universe. These deviations can be explained by the residual dependence of concentration on the local slope of the matter power spectrum, $n$, which affects both the normalization and shape… 
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