Measuring dark energy spatial inhomogeneity with supernova data

Abstract

The gravitational lensing distortion of distant sources by the large-scale distribution of matter in the Universe has been extensively studied. In contrast, very little is known about the effects due to the large-scale distribution of dark energy. We discuss the use of Type Ia supernovae as probes of the spatial inhomogeneity and anisotropy of dark energy. We show that a shallow, almost all-sky survey can limit rms dark energy fluctuations at the horizon scale down to a fractional energy density of ~10^-4

4 pages; PRL submitted

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• Constraints on a Bianchi type I spacetime extension of the standard $\Lambda$CDM model
• Is there Correlation between Fine Structure and Dark Energy Cosmic Dipoles?
• Interpretation of the Hubble diagram in a nonhomogeneous universe
• Constraining the Anisotropic Expansion of Universe
• Probing the anisotropic expansion from supernovae and GRBs in a model-independent way
• Testing spatial curvature and anisotropic expansion on top of the $\Lambda$CDM model
• Probing Dark Energy Anisotropy
• Searching for a preferred direction with Union2.1 data
• Bianchi-V String Cosmological model with Dark Energy Anisotropy
• Can all cosmological observations be accurately interpreted with a unique geometry?
• Unveiling the Dynamics of the Universe
• Cosmological model with local symmetry of very special relativity and constraints on it from supernovae
• Probing bulk flow with nearby SNe Ia data
• Screening anisotropy via energy-momentum squared gravity: $\Lambda$CDM model with hidden anisotropy
• Dark Energy Cosmological Models with General forms of Scale Factor
• Anisotropic massive Brans-Dicke gravity extension of the standard $\Lambda$CDM model
• Detecting Dark Energy Fluctuations with Gravitational Waves
• Modelling non-linear evolution using Lagrangian Perturbation Theory (LPT) re-expansions
• Testing Local Anisotropy Using the Method of Smoothed Residuals I - Methodology
• Probing the Cosmological Principle with weak lensing shear
• Extracting the size of the cosmic electron-positron anomaly
• Angular distribution of cosmological parameters as a probe of space-time inhomogeneities
• Fluctuating Dark Energy and the Luminosity Distance
• CMB Anomalies from Imperfect Dark Energy: Confrontation with the Data
• Fluctuation of the Hubble parameter
• Dark Energy Induced Anisotropy in Cosmic Expansion