On detecting interactions in the dark sector with H(z) data

Abstract

An interesting approach to the cosmological coincidence problem is to allow dark matter and dark energy interact with each other also nongravitationally. We consider two general Ansätze for such an interaction and appraise their ability to address the coincidence problem. We determine the average accuracy required on the cosmic expansion rate data to distinguish interacting cosmological models from the conventional $\Lambda$CDM scenario. We find that among the planned surveys the Wide Field Infrared Survey Telescope has the best chance to detect an interaction, though at a low significance level. To unambiguously determine the existence of an interaction one must, therefore, combine the said expansion data with other probes.

10 pages

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Cited by in corpus (10)

• Hubble parameter measurement constraints on the redshift of the deceleration-acceleration transition, dynamical dark energy, and space curvature
• Cosmographic bounds on the cosmological deceleration-acceleration transition redshift in $f(\mathcal{R})$ gravity
• Observational constraint on interacting Tsallis holographic dark energy in logarithmic Brans-Dicke theory
• Evidence for interacting dark energy from BOSS
• Probing the imprint of interacting dark energy on very large scales
• Constraining interacting dark energy with CMB and BAO future surveys
• Constraining the dark energy models with H(z) data: an approach independent of $H_0$
• Constraining the Asymptotically Safe Cosmology: cosmic acceleration without dark energy
• Mutually interacting Tachyon dark energy with variable $G$ and $\Lambda$
• The model-independent degeneracy-breaking point in cosmological models with interacting Dark Energy and Dark Matter