Signature of the interaction between dark energy and dark matter in galaxy clusters

Abstract

We investigate the influence of an interaction between dark energy and dark matter upon the dynamics of galaxy clusters. We obtain the general Layser-Irvine equation in the presence of interactions, and find how, in that case, the virial theorem stands corrected. Using optical, X-ray and weak lensing data from 33 relaxed galaxy clusters, we put constraints on the strength of the coupling in the dark sector. We find that this coupling is small but positive, indicating that dark energy can be decaying into dark matter.

Minor changes. Replaced to match version published in Phys. Lett. B673: 107 (2009) -- 4 pages, 3 figures

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• Simultaneous Falsification of LCDM and Quintessence with Massive, Distant Clusters
• The Cosmological Dynamics of Interacting Holographic Dark Energy Model
• Coupled dark matter-dark energy in light of near Universe observations
• The imprint of the interaction between dark sectors in large scale cosmic microwave background anisotropies
• Thermodynamical Interpretation of the Interacting Holographic Dark Energy Model in a non-flat Universe
• Effects of dark sectors' mutual interaction on the growth of structures
• Cosmological Evolution of Quintessence and Phantom with a New Type of Interaction in Dark Sector
• Interacting Cosmological Fluids and the Coincidence Problem
• Revisiting the Cosmological Constraints on the Interacting Dark Energy Models
• The signature of dark energy perturbations in galaxy cluster surveys
• Reconstructing interacting new agegraphic polytropic gas model in non-flat FRW universe
• Constraining the interacting dark energy models from weak gravity conjecture and recent observations
• $H(z)$ diagnostics on the nature of dark energy