Probing the Cosmological Principle with weak lensing shear
arXiv:2411.08560 · doi:10.1088/1475-7516/2025/02/016
Abstract
The Cosmological Principle is a cornerstone of the standard model of cosmology and shapes how we view the Universe and our place within it. It is imperative, then, to devise multiple observational tests which can identify and quantify possible violations of this foundational principle. One possible method of probing large-scale anisotropies involves the use of weak gravitational lensing. We revisit this approach in order to analyse the imprint of late-time anisotropic expansion on cosmic shear. We show that the cross-correlation of shear - and -modes on large scales can be used to constrain the magnitude (and possibly direction) of anisotropic expansion. We estimate the signal to noise for multipoles that is achievable by a Euclid-like survey. Our findings suggest that such a survey could detect the - signal for reasonable values of the late-time anisotropy parameter.
Added short explanation of Figure 3.1. Matches version accepted by JCAP
References in corpus (77)
- SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
- Array Programming with NumPy
- The Cosmic Linear Anisotropy Solving System (CLASS) II: Approximation schemes
- Stable clustering, the halo model and nonlinear cosmological power spectra
- Revising the Halofit Model for the Nonlinear Matter Power Spectrum
- Weak Gravitational Lensing of the CMB
- Measuring the dark side (with weak lensing)
- Ray-tracing through the Millennium Simulation: Born corrections and lens-lens coupling in cosmic shear and galaxy-galaxy lensing
- Massive Neutrinos and the Non-linear Matter Power Spectrum
- The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology
- Is the Observable Universe Consistent with the Cosmological Principle?
- Discriminating weak lensing from intrinsic spin correlations using the curl-gradient decomposition
- B-modes in cosmic shear from source redshift clustering
- Dark Energy versus Modified Gravity
- Evidence for anisotropy of cosmic acceleration
- Theory of cosmological perturbations in an anisotropic universe
- Measuring Statistical isotropy of the CMB anisotropy
- Bianchi type III models with anisotropic dark energy
- Probing the anisotropic local universe and beyond with SNe Ia data
- LRS Bianchi Type I Models with Anisotropic Dark Energy and Constant Deceleration Parameter
- How isotropic is the Universe?
- Predictions from an anisotropic inflationary era
- Lensed CMB power spectra from all-sky correlation functions
- Accelerating Cosmologies with an Anisotropic Equation of State
- Anisotropic Dark Energy: Dynamics of Background and Perturbations
- Weak Gravitational Lensing
- Precision calculations of the cosmic shear power spectrum projection
- Intrinsic alignments of galaxies in the Horizon-AGN cosmological hydrodynamical simulation
- Second Order Corrections to Weak Lensing by Large-Scale Structure
- 3D Cosmic Shear: Cosmology from CFHTLenS
- Non-linear bigravity and cosmic acceleration
- Intrinsic alignment of simulated galaxies in the cosmic web: implications for weak lensing surveys
- Dynamics of Bianchi I Universe with Magnetized Anisotropic Dark Energy
- Measuring cosmic bulk flows with Type Ia Supernovae from the Nearby Supernova Factory
- Constraints on anisotropic cosmic expansion from supernovae
- Full-sky lensing shear at second order
- The Limits of Cosmic Shear
- de Sitter expansion with anisotropic fluid in Bianchi type-I space-time
- Direction Dependence of the Deceleration Parameter
- Probing the anisotropic expansion from supernovae and GRBs in a model-independent way
- Probing Dark Energy Anisotropy
- Testing spatial curvature and anisotropic expansion on top of the CDM model
- Probing bulk flow with nearby SNe Ia data
- Odd-Parity Bipolar Spherical Harmonics
- Measuring dark energy spatial inhomogeneity with supernova data
- Anisotropic stress and stability in modified gravity models
- Bianchi I meets the Hubble diagram
- Anisotropic expansion and SNIa: an open issue
- Do supernovae indicate an accelerating universe?
- Testing gaussianity, homogeneity and isotropy with the cosmic microwave background
- How should spin-weighted spherical functions be defined?
- Unveiling Hidden Patterns in CMB Anisotropy Maps
- Light propagation in inhomogeneous and anisotropic cosmologies
- Weak-lensing by the large scale structure in a spatially anisotropic universe: theory and predictions
- Linearization of homogeneous, nearly-isotropic cosmological models
- The multipole expansion of the local expansion rate
- Weak lensing generated by vector perturbations and detectability of cosmic strings
- Full-sky formulae for weak lensing power spectra from total angular momentum method
- Bipolar Harmonic encoding of CMB correlation patterns
- Weak lensing B-modes on all scales as a probe of local isotropy
- Bianchi type II models in the presence of perfect fluid and anisotropic dark energy
- Covariant cosmography: the observer-dependence of the Hubble parameter
- Helium-4 Synthesis in an Anisotropic Universe
- The Cosmic Microwave Background Bipolar Power Spectrum: Basic Formalism and Applications
- Weak-lensing -modes as a probe of the isotropy of the universe
- Cosmography of the Local Universe by Multipole Analysis of the Expansion Rate Fluctuation Field
- Supernovae anisotropy power spectrum
- A novel approach to reconstructing signals of isotropy violation from a masked CMB sky
- Structure formation in an anisotropic universe: Eulerian perturbation theory
- Bianchi spacetimes as super-curvature modes around isotropic cosmologies
- Tomographic redshift dipole: Testing the cosmological principle
- Testing Local Anisotropy Using the Method of Smoothed Residuals I - Methodology
- Search for Global Metric Anisotropy in Type Ia Supernova Data
- Euclid: Testing the Copernican principle with next-generation surveys
- Scalar field emulator via anisotropically deformed vacuum energy: Application to dark energy
- Cosmic topology. Part IIIa. Microwave background parity violation without parity-violating microphysics
- Statistical Isotropy of CMB and Cosmic Topology