Breaking parameter degeneracy in interacting dark energy models from observations

Abstract

We study the interacting dark energy model with time varying dark energy equation of state. We examine the stability in the perturbation formalism and the degeneracy among the coupling between dark sectors, the time-dependent dark energy equation of state and dark matter abundance in the cosmic microwave background radiation. Further we discuss the possible ways to break such degeneracy by doing global fitting using the latest observational data and we get a tight constraint on the interaction between dark sectors.

8 pages, 6 figures, accepted for publication in Phys.Lett.B

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Cited by in corpus (24)

• Dark Matter and Dark Energy Interactions: Theoretical Challenges, Cosmological Implications and Observational Signatures
• Interacting Dark Energy -- constraints and degeneracies
• Testing models of vacuum energy interacting with cold dark matter
• Interacting Dark Energy: Possible Explanation for 21-cm Absorption at Cosmic Dawn
• Probing the imprint of interacting dark energy on very large scales
• Distinguishing interacting dark energy from wCDM with CMB, lensing, and baryon acoustic oscillation data
• Search for sterile neutrinos in a universe of vacuum energy interacting with cold dark matter
• The effect of Dark Matter and Dark Energy interactions on the peculiar velocity field and the kinetic Sunyaev-Zel'dovich effect
• Quantifying the impacts of future gravitational-wave data on constraining interacting dark energy
• Exploring neutrino mass and mass hierarchy in interacting dark energy models
• A Model for Dark Energy decay
• Models of vacuum energy interacting with cold dark matter: Constraints and comparison
• Exploring interacting holographic dark energy in a perturbed universe with parameterized post-Friedmann approach
• Deep connection between f(R) gravity and the interacting dark sector model
• Constraining the interaction between dark sectors with future HI intensity mapping observations
• Early dark energy and its interaction with dark matter
• Effective dark energy equation of state in interacting dark energy models
• The signature of the scattering between dark sectors in large scale cosmic microwave background anisotropies
• Interacting agegraphic dark energy model in tachyon cosmology coupled to matter
• Reconstruction of the interaction term between dark matter and dark energy using SNe Ia
• Signature of the interaction between dark sectors in the reionization process
• Reconstruction of the interaction term between dark matter and dark energy using SNe Ia, BAO, CMB, H(z) and X-ray gas mass fraction
• The Matter Power Spectrum of Dark Energy Models and the Harrison-Zel'dovich Prescription
• Forecasts on Interacting Dark Energy from 21-cm Angular Power Spectrum with BINGO and SKA observations