The imprint of the interaction between dark sectors in galaxy clusters

Abstract

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.

revised version. New treatment has been provided on studying the structure formation in the spherical collapsing system where DE does not cluster together with DM. Accepted for publication in JCAP

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Cited by in corpus (52)

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• Cosmological Constraints on the Sign-Changeable Interactions
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• The BINGO Project I: Baryon Acoustic Oscillations from Integrated Neutral Gas Observations
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• The effect of Dark Matter and Dark Energy interactions on the peculiar velocity field and the kinetic Sunyaev-Zel'dovich effect
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• A Model for Dark Energy decay
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• Forecasts on Interacting Dark Energy from 21-cm Angular Power Spectrum with BINGO and SKA observations
• Spherical collapse in reconstructed dark energy models