Probing the sign-changeable interaction between dark energy and dark matter with current observations

Abstract

We consider the models of vacuum energy interacting with cold dark matter in this study, in which the coupling can change sigh during the cosmological evolution. We parameterize the running coupling $b$ by the form $b(a)=b_{0}a+b_e(1-a)$, where at the early-time the coupling is given by a constant $b_e$ and today the coupling is described by another constant $b_0$. We explore six specific models with (i) $Q(a)=b(a)H_0{\rho }_0$, (ii) $Q(a)=b(a)H_0{\rho }_{\mathrm{de}}$, (iii) $Q(a)=b(a)H_0{\rho }_{\mathrm{c}}$, (iv) $Q(a)=b(a)H{\rho }_0$, (v) $Q(a)=b(a)H{\rho }_{\mathrm{de}}$, and (vi) $Q(a)=b(a)H{\rho }_{\mathrm{c}}$. The current observational data sets we use to constrain the models include the JLA compilation of type Ia supernova data, the Planck 2015 distance priors data of cosmic microwave background observation, the baryon acoustic oscillations measurements, and the Hubble constant direct measurement. We find that, for all the models, we have $b_0<0$ and $b_e>0$ at around the 1$\sigma$ level, and $b_0$ and $b_e$ are in extremely strong anti-correlation. Our results show that the coupling changes sign during the evolution at about the 1$\sigma$ level, i.e., the energy transfer is from dark matter to dark energy when dark matter dominates the universe and the energy transfer is from dark energy to dark matter when dark energy dominates the universe.

10 pages, 3 figures

References in corpus (29)

• Dynamics of dark energy
• Dark Energy and the Accelerating Universe
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Reconstructing Dark Energy
• Large-scale instability in interacting dark energy and dark matter fluids
• Dark Energy-Dark Matter Interaction and putative violation of the Equivalence Principle from the Abell Cluster A586
• Dynamics of dark energy with a coupling to dark matter
• Effects of the interaction between dark energy and dark matter on cosmological parameters
• Probing the interaction between dark matter and dark energy in the presence of massive neutrinos
• Interacting Dark Energy and Dark Matter: observational Constraints from Cosmological Parameters
• Statefinder diagnosis for the interacting model of holographic dark energy
• Testing the interaction between dark energy and dark matter via latest observations
• The imprint of the interaction between dark sectors in large scale cosmic microwave background anisotropies
• Cosmological constraints on a decomposed Chaplygin gas
• Effects of dark sectors' mutual interaction on the growth of structures
• Parametrized Post-Friedmann Framework for Interacting Dark Energy
• Cosmological Evolution of Quintessence and Phantom with a New Type of Interaction in Dark Sector
• Exploring the full parameter space for an interacting dark energy model with recent observations including redshift-space distortions: Application of the parametrized post-Friedmann approach
• Constraining interacting dark energy models with latest cosmological observations
• Revisit of the interacting holographic dark energy model after Planck 2015
• Revisit of the Interaction between Holographic Dark Energy and Dark Matter
• Cosmological constant vis-a-vis dynamical vacuum: bold challenging the $\Lambda$CDM
• Probing the interaction between dark energy and dark matter with the parametrized post-Friedmann approach
• Effects of time-varying $\beta$ in SNLS3 on constraining interacting dark energy models
• Redshift drift constraints on holographic dark energy
• $\Lambda (t)$CDM Model as a Unified Origin of Holographic and Agegraphic Dark Energy Models
• No evidence for the evolution of mass density power-law index $\gamma$ from strong gravitational lensing observation
• Cosmological evolution of quintessence with a sign-changing interaction in dark sector
• Holographic Λ(t)CDM model in a non-flat universe

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• On sign-changeable interaction in FLRW cosmology