KiDS+VIKING-450 and DES-Y1 combined: Mitigating baryon feedback uncertainty with COSEBIs

Abstract

We present cosmological constraints from a joint cosmic shear analysis of the Kilo-Degree Survey (KV450) and the Dark Energy Survey (DES-Y1), conducted using Complete Orthogonal Sets of E/B-Integrals (COSEBIs). With COSEBIs we isolate any B-modes which have a non-cosmic shear origin and demonstrate the robustness of our cosmological E-mode analysis as no significant B-modes are detected. We highlight how COSEBIs are fairly insensitive to the amplitude of the non-linear matter power spectrum at high $k$-scales, mitigating the uncertain impact of baryon feedback in our analysis. COSEBIs, therefore, allow us to utilise additional small-scale information, improving the DES-Y1 joint constraints on $S_8={\sigma }_8({\Omega }_{\mathrm{m}}/0.3{)}^{0.5}$ and ${\Omega }_{\mathrm{m}}$ by $20\%$. Adopting a flat $\Lambda$CDM model we find $S_8=0.755_{-0.021}^{+0.019}$, which is in $3.2\sigma$ tension with the Planck Legacy analysis of the cosmic microwave background.

Accepted for publication in A&A. 15 pages, 7 figures

References in corpus (10)

• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• Astrophysics Source Code Library
• Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements
• Extended Limber Approximation
• Estimating the Redshift Distribution of Faint Galaxy Samples
• Means of confusion: how pixel noise affects shear estimates for weak gravitational lensing
• Analysis of two-point statistics of cosmic shear: III. Covariances of shear measures made easy
• Shear Power Spectrum Reconstruction using Pseudo-Spectrum Method
• Redshift and Shear Calibration: Impact on Cosmic Shear Studies and Survey Design
• A New Data Compression Method and its Application to Cosmic Shear Analysis

Cited by in corpus (60)

• Challenges for $\Lambda$CDM: An update
• Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Data Calibration
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• Arbitrating the $S_8$ discrepancy with growth rate measurements from Redshift-Space Distortions
• A non-linear solution to the $S_8$ tension?
• Dark Sector to Restore Cosmological Concordance
• H0 tension or T0 tension?
• KiDS-1000: cosmic shear with enhanced redshift calibration
• Testing AdS early dark energy with Planck, SPTpol and LSS data
• The Aemulus Project V: Cosmological constraint from small-scale clustering of BOSS galaxies
• Neural Network Reconstruction of Late-Time Cosmology and Null Tests
• KiDS & Euclid: Cosmological implications of a pseudo angular power spectrum analysis of KiDS-1000 cosmic shear tomography
• Gravitational-Wave Detector Networks: Standard Sirens on Cosmology and Modified Gravity Theory
• KiDS-1000: Cosmology with improved cosmic shear measurements
• On the halo-mass and radial scale dependence of the lensing is low effect
• Cosmology Intertwined: A Review of the Particle Physics, Astrophysics, and Cosmology Associated with the Cosmological Tensions and Anomalies
• Dark Energy Survey internal consistency tests of the joint cosmological probes analysis with posterior predictive distributions
• Magnification bias in galaxy surveys with complex sample selection functions
• Minimally Modified Gravity fitting Planck data better than $\Lambda$CDM
• Persistent homology in cosmic shear II: A tomographic analysis of DES-Y1
• KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes
• KiDS-1000 cosmology: Combined second- and third-order shear statistics
• On the consistency of $\Lambda$CDM with CMB measurements in light of the latest Planck, ACT, and SPT data
• Minimal theory of massive gravity in the light of CMB data and the $S_8$ tension
• Dynamical Dark Energy Implies a Coupled Dark Sector: Insights from DESI DR2 via a Data-Driven Approach
• KiDS-1000 Cosmology: Constraints from density split statistics
• Improved constraint on primordial gravitational waves in light of the Hubble tension and BICEP/Keck
• A roadmap to cosmological parameter analysis with third-order shear statistics I: Modelling and validation
• A Unified Catalog-level Reanalysis of Stage-III Cosmic Shear Surveys
• The effects of varying depth in cosmic shear surveys
• Assessing the accuracy of cosmological parameters estimated from velocity -- density comparisons via simulations
• Addressing Cosmological Tensions by Non-Local Gravity
• Altered Axion Abundance from a Dynamical Peccei-Quinn Scale
• Neutrino mass tension or suppressed growth rate of matter perturbations?
• On the interacting dark energy scenarios $-$ the case for Hubble constant tension
• Cluster counts III. $\Lambda$CDM extensions and the cluster tension
• Does the fraction of dark matter diminish with early dark energy?
• A revised density split statistic model for general filters
• Quantum yield and charge diffusion in the Nancy Grace Roman Space Telescope infrared detectors
• Tightening weak lensing constraints on the ellipticity of galaxy-scale dark matter haloes
• Tests of Standard Cosmology in Horava Gravity and Bayesian Evidence for a Closed Universe, and the Hubble Tension
• Euclid and KiDS-1000: Quantifying the impact of source-lens clustering on cosmic shear analyses
• I. Linear Interacting Dark Energy: Analytical Solutions and Theoretical Pathologies
• Kinetic Field Theory for Cosmic Structure Formation
• Unveiling the Universe with Emerging Cosmological Probes
• Axi-Higgs cosmology: Cosmic Microwave Background and cosmological tensions
• E/B mode decomposition of HSC-Y1 cosmic shear using COSEBIs: cosmological constraints and comparison with other two-point statistics
• What is the super-sample covariance? A fresh perspective for second-order shear statistics
• Dark energy-dark matter interactions as a solution to the $S_8$ tension
• Pure-mode correlation functions for cosmic shear and application to KiDS-1000
• On the degeneracy between $f{\sigma }_8$ tension and its Gaussian process forecasting
• Catalog-level blinding on the bispectrum for DESI-like galaxy surveys
• Mapping luminous and dark matter in the Universe
• Nonlinear Matter Power Spectrum from relativistic $N$-body Simulations: ${\Lambda }_{\mathrm{s}}$CDM versus $\Lambda$CDM
• Pixel centroid characterization with laser speckle and application to the Nancy Grace Roman Space Telescope detector arrays
• 6x2pt: Forecasting gains from joint weak lensing and galaxy clustering analyses with spectroscopic-photometric galaxy cross-correlations
• Dusty Clump Survival in Supernova Ejecta: Dust-Mediated Growth vs. Crushing by the Reverse Shock
• Void spin distribution as a powerful probe of ${\sigma }_8$
• Dynamics of tachyon dark energy on large scales and its imprint on observed galaxy power spectrum
• Effect of dust in circumgalactic haloes on the cosmic shear power spectrum