Dark matter-dark energy interaction for a time-dependent equation of state

Abstract

In this work we investigate the interaction between dark matter and dark energy for a coupling that obeys the Wang-Meng decaying law, ${\rho }_{\mathrm{DM}}\propto (1+z{)}^{3-\epsilon }$, and the Barboza-Alcaniz dark energy parametric model, $w=w_0+w_0^{\prime }z(1+z)/(1+z^2)$. Theoretically, we show that the coupling constant, $\epsilon$, should satisfy the physical constraint $\epsilon \ge 0$. We use the most recent data of type Ia supernovae, baryon acoustic oscillations, cosmic microwave background and the Hubble expansion rate function to constrain the free parameters of the model. From a purely observational point of view, we show that is not possible to discard values of the coupling constant in the unphysical region $\epsilon <0$. We show that the uncoupled case, $\epsilon =0$, is in better agreement with the data than any of coupled models in the physical region. We also find that all physically acceptable interaction in dark sector lies in the narrow range $0<\epsilon \le 0.034$ ($95\%$ CL).

6 pages, 2 figures, 1 table

References in corpus (8)

• Wilkinson Microwave Anisotropy Probe (WMAP) Three Year Results: Implications for Cosmology
• Cosmology and the Fate of Dilatation Symmetry
• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Likelihoods and Parameters from the WMAP data
• A parametric model for dark energy
• Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields
• Testing cosmic opacity from SNe Ia and Hubble parameter through three cosmological-model-independent methods
• Does the Big Rip survive quantization?
• Quantum fields near phantom-energy `sudden' singularities

Cited by in corpus (15)

• Probing the interaction between dark matter and dark energy in the presence of massive neutrinos
• Dark sector interaction: a remedy of the tensions between CMB and LSS data
• A new interacting two fluid model and its consequences
• Novel approach towards the large-scale stable Interacting Dark-Energy models and their Astronomical Bounds
• Constraining a dark matter and dark energy interaction scenario with a dynamical equation of state
• Soundness of Dark Energy properties
• Observational constraints on dark matter-dark energy scattering cross section
• Cosmological direct detection of dark energy: non-linear structure formation signatures of dark energy scattering with visible matter
• Tightening the reins on non-minimal dark sector physics: Interacting Dark Energy with dynamical and non-dynamical equation of state
• Background evolution and growth of structures in interacting dark energy through dynamical system analysis
• Constraining the cosmological model of modified $f(Q)$ gravity: Phantom dark energy and observational insights
• Constraints On Dark Energy Models From Galaxy Clusters and Gravitational Lensing Data
• Square-Root parametrization of dark energy in $f(Q)$ cosmology
• Dark Energy and Modified Scale Covariant Theory of Gravitation
• Interacting Dark Energy: New parametrization and observational constraints