Decaying Cold Dark Matter and the Evolution of the Cluster Abundance

  title={Decaying Cold Dark Matter and the Evolution of the Cluster Abundance},
  author={Masamune Oguri and Keitaro Takahashi and Hiroshi Ohno and Kei Kotake},
  journal={The Astrophysical Journal},
The cluster abundance and its redshift evolution are known to be powerful tools for constraining the amplitude of mass fluctuations σ8 and the mass density parameter Ωm0. We study the impact of the finite decay rate of cold dark matter particles on the cluster abundances. On the basis of a spherical model in a decaying cold dark matter universe, we calculate the mass function of clusters and compare it with observed cluster abundance. We find the decay of cold dark matter particles… 

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