The imprint of the interaction between dark sectors in galaxy clusters

He Jian-Hua, Wang Bin, Elcio Abdallab, Diego Pavon

Research output: Contribution to journalArticleResearchpeer-review

34 Citations (Scopus)


Based on perturbation theory, we study the dynamics of how dark matter and dark energy in the collapsing system approach dynamical equilibrium when they are in interaction. We find that the interaction between dark sectors cannot ensure the dark energy to fully cluster along with dark matter. When dark energy does not trace dark matter, we present a new treatment on studying the structure formation in the spherical collapsing system. Furthermore we examine the cluster number counts dependence on the interaction between dark sectors and 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. © 2010 IOP Publishing Ltd and SISSA.
Original languageEnglish
Article number022
JournalJournal of Cosmology and Astroparticle Physics
Issue number12
Publication statusPublished - 1 Dec 2010


  • Cluster counts
  • Dark energy theory


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