2009

The imprint of the interaction between dark sectors in galaxy clusters

He, Jian-Hua, Wang, Bin, Abdalla, Elcio et al.

Understand

Based on perturbation theory, we study the dynamics of how dark matter and dark energy in the collapsing system approach dynamical equilibrium while interacting.

  • We find that the interaction between dark sectors cannot ensure the dark energy to fully cluster along with dark, leading to the energy non-conservation problem in the collapsing system We examine the cluster number counts dependence on the interaction between dark sectors.
  • Furthermore, we analyze how dark energy inhomogeneities affect cluster abundances.
  • It is shown that cluster number counts can provide specific signature of dark sectors interaction and dark energy inhomogeneities.

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