Large-scale Stability and Astronomical Constraints for Coupled Dark-Energy Models

Abstract

We study large-scale inhomogeneous perturbations and instabilities of interacting dark energy (IDE) models. Past analysis of large-scale perturbative instabilities, has shown that we can only test IDE models with observational data when its parameter ranges are either $w_x\ge -1$ and $\xi \ge 0,$ or $w_x\le -1$ and $\xi \le 0$, where $w_x$ is the dark energy equation of state (EoS), and $\xi$ is a coupling parameter governing the strength and direction of the energy transfer. We show that by adding a factor $(1+w_x)$ to the background energy transfer, the whole parameter space can be tested against all the data and thus, the instabilities in such interaction models can be removed. We test three classes of interaction model using the latest astronomical data from different sources. Precise constraints are found. Our analysis shows that a very small but non-zero deviation from pure $\Lambda$-cosmology is suggested by the observational data while the no-interaction scenario can be recovered at the 68.3% confidence-level. In particular, for three IDE models, identified as IDE 1, IDE 2, and IDE 3, the 68.3% CL constraints on the interaction coupling strengths are, $\xi =0.0360_{-0.0360}^{+0.0091}$ (IDE 1), $\xi =0.0433_{-0.0433}^{+0.0062}$ (IDE 2), $\xi =0.1064_{-0.1064}^{+0.0437}$ (IDE 3). In addition, we find that the dark energy EoS tends towards the phantom region taking the 68.3% CL constraints, $w_x=-1.0230_{-0.0257}^{+0.0329}$ (IDE 1), $w_x=-1.0247_{-0.0302}^{+0.0289}$ (IDE 2), and $w_x=-1.0275_{-0.0318}^{+0.0228}$ (IDE 3). However, the possibility of $w_x>-1$ is also not rejected by the astronomical data used here. Moreover, we find in all IDE models that, as the value of Hubble constant decreases, the behavior of the dark energy EoS shifts from phantom to quintessence type with its EoS very close to that a simple cosmological constant at the present time.

18 pages; Some typos are corrected; Abstract has been shortened at the end but the full abstract is kept in the journal version; Published in Phys. Rev. D

References in corpus (24)

• Dynamics of dark energy
• Cosmology and the Fate of Dilatation Symmetry
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Can interacting dark energy solve the $H_0$ tension?
• Large-scale instability in interacting dark energy and dark matter fluids
• Dynamics of dark energy with a coupling to dark matter
• Indications of a late-time interaction in the dark sector
• Cosmologies with Energy Exchange
• Effects of the interaction between dark energy and dark matter on cosmological parameters
• Echo of interactions in the dark sector
• Probing the interaction between dark matter and dark energy in the presence of massive neutrinos
• Dark Interactions and Cosmological Fine-Tuning
• A new interacting two fluid model and its consequences
• Dark Coupling and Gauge Invariance
• Reconstructing the dark sector interaction with LISA
• Constraining a dark matter and dark energy interaction scenario with a dynamical equation of state
• In search of the dark matter dark energy interaction: a kinematic approach
• Coupled dark energy with perturbed Hubble expansion rate
• Cosmological constraints on coupled dark energy
• Interacting Cosmological Fluids and the Coincidence Problem
• Constraint on $f(R)$ Gravity through the Redshift Space Distortion
• CMB and matter power spectra with non-linear dark-sector interactions
• Gravitational Waves: A Test for Modified Gravity
• Confronting Dark Energy Anisotropic Stress

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