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Signature of the interaction between dark energy and dark matter in observations
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We investigate the effect of an interaction between dark energy and dark matter upon the dynamics of galaxy clusters. This effect is computed through the Layser-Irvine equation, which describes how an astrophysical system reaches virial equilibrium and was modified to include the dark interactions. Using observational data from almost 100 purportedly relaxed galaxy clusters we put constraints on the strength of the couplings in the dark sector. We compare our results with those from other observations and find that a positive (in the sense of energy flow from dark energy to dark matter) non vanishing interaction is consistent with the data within several standard deviations.
Forward citations
Cited by 3 Pith papers
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The frozen vanilla model: Exploring dark sector interactions with delta effective theories
A dark sector interaction that acts only on perturbations leaves the background expansion untouched while changing the integrated Sachs-Wolfe effect, matter clustering, fσ8, and S8 predictions.
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Interacting dark energy in the early 2020s: a promising solution to the $H_0$ and cosmic shear tensions
An interacting dark energy model with coupling proportional to the dark energy density alleviates the H0 and S8 tensions in Planck 2018 data but is not preferred once BAO and supernova data are included.
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Testing the Dark Universe through the Layzer-Irvine Equation
Reviews the Layzer-Irvine equation and discusses its prior use in dark matter-dark energy interaction and modified gravity models while suggesting future directions.
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