Scalar field dark energy perturbations and the Integrated Sachs Wolfe effect

Abstract

Dark energy perturbation affects the growth of matter perturbations even in scenarios with noninteracting dark energy. We investigate the Integrated Sachs Wolfe (ISW) effect in various canonical scalar field models with perturbed dark energy. We do this analysis for models belonging to the thawing and freezing classes. We show that between these classes there is no clear difference for the ISW effect. We show that on taking perturbations into account, the contribution due to different models is closer to each other and to the cosmological constant model as compared to the case of a smooth dark energy. Therefore considering dark energy to be homogeneous gives an overestimate in distinction between different models. However there are significant difference between contribution to the angular power spectrum due to different models.

4 pages, 3 postscript figures. references added, changes in text, conclusions remain the same

References in corpus (18)

• Five-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Interpretation
• Cosmology and the Fate of Dilatation Symmetry
• Correlation of CMB with large-scale structure: I. ISW Tomography and Cosmological Implications
• The shape of the SDSS DR5 galaxy power spectrum
• Structure formation in the presence of dark energy perturbations
• Gauge-invariant analysis of perturbations in Chaplygin gas unified models of dark matter and dark energy
• The spherical collapse model and cluster formation beyond the $\Lambda$ cosmology: Indications for a clustered dark energy?
• The High Redshift Integrated Sachs-Wolfe Effect
• Voids of dark energy
• Scalar Field Dark Energy Perturbations and their Scale Dependence
• Probing Dark Energy at Galactic and Cluster Scales
• A new perspective on the relation between dark energy perturbations and the late-time ISW effect
• Evolution of Dark Energy Perturbations in Scalar-Tensor Cosmologies
• A mathematical analysis of the evolution of perturbations in a modified Chaplygin gas model
• Clustering Properties of Dynamical Dark Energy Models
• A comparison of perturbations in fluid and scalar field models of dark energy
• The Integrated Sachs-Wolfe Effect in Time Varying Vacuum Model
• Perturbed dark energy: classical scalar field versus tachyon

Cited by in corpus (13)

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• Growth of spherical overdensities in scalar-tensor cosmologies
• Observational constraints on quintessence models of dark energy
• Reconstruction of late-time cosmology using Principal Component Analysis
• Evolution of shifted cosmological parameter and shifted dust matter in a two-phase tachyonic field universe
• Dark energy homogeneity in general relativity: Are we applying it correctly?
• Reconstruction of Dynamical Dark Energy Potentials: Quintessence, Tachyon and interacting models
• Perturbations in Tachyon Dark Energy and their Effect on Matter Clustering
• Tachyonic vs Quintessence dark energy: linear perturbations and CMB data
• Perturbations In Some Dark Energy Models