Degeneracy between nonadiabatic dark energy models and $\Lambda$CDM: ISW effect and the cross correlation of CMB with galaxy clustering data

Abstract

As recently pointed out in Ref. [Phys.\ Rev.\ D {\bf 96}, 8, 083502 (2017)] the evolution of the linear matter perturbations in nonadiabatic dynamical dark energy models is almost indistinguishable (quasi-degenerated) to the standard $\Lambda$CDM scenario. In this work we extend this analysis to CMB observables in particular the integrated Sachs-Wolfe effect and its cross-correlation with large scale structure. We find that this feature persists for such CMB related observable reinforcing that new probes and analysis are necessary to reveal the nonadiabatic features in the dark energy sector.

arXiv comment9 pages, 8 figures

References in corpus (28)

• Dynamics of dark energy
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
• A 2.4% Determination of the Local Value of the Hubble Constant
• Improved cosmological constraints from a joint analysis of the SDSS-II and SNLS supernova samples
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Constraints on the redshift dependence of the dark energy potential
• Cosmic Chronometers: Constraining the Equation of State of Dark Energy. I: H(z) Measurements
• Improved constraints on the expansion rate of the Universe up to z~1.1 from the spectroscopic evolution of cosmic chronometers
• Quasar-Lyman $\alpha$ Forest Cross-Correlation from BOSS DR11 : Baryon Acoustic Oscillations
• Correlation of CMB with large-scale structure: I. ISW Tomography and Cosmological Implications
• Phenomenological parameterization of quintessence
• Large-scale curvature and entropy perturbations for multiple interacting fluids
• Characterizing the Mid-IR Extragalactic Sky with WISE and SDSS
• Does Bulk Viscosity Create a Viable Unified Dark Matter Model?
• Adiabatic and entropy perturbations with interacting fluids and fields
• The non-adiabatic pressure in general scalar field systems
• Constraints on dissipative unified dark matter
• A WISE measurement of the ISW effect
• The lensing and temperature imprints of voids on the Cosmic Microwave Background
• Perturbations in cosmologies with a scalar field and a perfect fluid
• A new perspective on the relation between dark energy perturbations and the late-time ISW effect
• Large scale structure and ISW effect in decaying vacuum cosmology
• Revealing the non-adiabatic nature of dark energy perturbations from galaxy clustering data
• The magnitude of the non-adiabatic pressure in the cosmic fluid
• Non-adiabatic perturbations in multi-component perfect fluids

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• Cosmological constraints on parametrized interacting dark energy
• Imperfect fluid description of modified gravities
• The first direct measurement of gravitational potential decay rate at cosmological scales and improved dark energy constraint
• Effects of Dark Energy anisotropic stress on the matter power spectrum
• On (non-)dynamical dark energy
• Skewness of matter distribution in clustering dark energy cosmologies