Statistical Inconsistencies in the KiDS-450 Dataset

Abstract

The Kilo-Degree Survey (KiDS) has been used in several recent papers to infer constraints on the amplitude of the matter power spectrum and matter density at low redshift. Some of these analyses have claimed tension with the Planck $\Lambda \mathrm{CDM}$ cosmology at the $\sim 2-3\sigma$ level, perhaps indicative of new physics. However, Planck is consistent with other low redshift probes of the matter power spectrum such as redshift space distortions and the combined galaxy-mass and galaxy-galaxy power spectra. Here we perform consistency tests of the KiDS data, finding internal tensions for various cuts of the data at $\sim 2.2-3.5\sigma$ significance. Until these internal tensions are understood, we argue that it is premature to claim evidence for new physics from KiDS. We review the consistency between KiDS and other weak lensing measurements of $S_8$, highlighting the importance of intrinsic alignments for precision cosmology.

arXiv commentComments: 8 pages, 5 figures. Accepted for publication in MNRAS

References in corpus (36)

• Planck 2015 results. XIII. Cosmological parameters
• Planck 2013 results. XVI. Cosmological parameters
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Cosmological Parameter Results
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• Galaxy and Mass Assembly (GAMA): survey diagnostics and core data release
• Chandra Cluster Cosmology Project III: Cosmological Parameter Constraints
• KiDS-450: Cosmological parameter constraints from tomographic weak gravitational lensing
• CFHTLenS: The Canada-France-Hawaii Telescope Lensing Survey
• CFHTLenS tomographic weak lensing cosmological parameter constraints: Mitigating the impact of intrinsic galaxy alignments
• Planck 2013 results. XX. Cosmology from Sunyaev-Zeldovich cluster counts
• Galaxy And Mass Assembly (GAMA): end of survey report and data release 2
• Intrinsic alignment-lensing interference as a contaminant of cosmic shear
• Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements
• Planck 2015 results. XXIV. Cosmology from Sunyaev-Zeldovich cluster counts
• Cosmological Constraints from the SDSS maxBCG Cluster Catalog
• The Atacama Cosmology Telescope: Sunyaev-Zel'dovich Selected Galaxy Clusters at 148 GHz from Three Seasons of Data
• The Atacama Cosmology Telescope: Cosmological parameters from three seasons of data
• A Measurement of the Cosmic Microwave Background Damping Tail from the 2500-square-degree SPT-SZ survey
• Weighing the Giants IV: Cosmology and Neutrino Mass
• Galaxy alignments: An overview
• Planck 2015 results. XV. Gravitational lensing
• The Intrinsic Alignment of Galaxies and its Impact on Weak Gravitational Lensing in an Era of Precision Cosmology
• Weighing the Giants - I. Weak-lensing masses for 51 massive galaxy clusters: project overview, data analysis methods and cluster images
• Weighing the Giants - III. Methods and Measurements of Accurate Galaxy Cluster Weak-Lensing Masses
• Cosmological Constraints from Galaxy Clusters in the 2500 square-degree SPT-SZ Survey
• CFHTLenS revisited: assessing concordance with Planck including astrophysical systematics
• Constraints on intrinsic alignment contamination of weak lensing surveys using the MegaZ-LRG sample
• KiDS-450: Testing extensions to the standard cosmological model
• KiDS-450: The tomographic weak lensing power spectrum and constraints on cosmological parameters
• Cosmology from Cosmic Shear with DES Science Verification Data
• The 6dF Galaxy Survey: Peculiar Velocity Field and Cosmography
• Testing $\Lambda$CDM at the lowest redshifts with SN Ia and galaxy velocities
• Supercal: Cross-Calibration of Multiple Photometric Systems to Improve Cosmological Measurements with Type Ia Supernovae
• The Cosmological Impact of Intrinsic Alignment Model Choice for Cosmic Shear
• Cosmic Shear Results from the Deep Lens Survey - II: Full Cosmological Parameter Constraints from Tomography
• Weighing the Giants II: Improved Calibration of Photometry from Stellar Colors and Accurate Photometric Redshifts

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• On the Hubble constant tension in the SNe Ia Pantheon sample
• KiDS+VIKING-450: Cosmic shear tomography with optical+infrared data
• Evolution of the $f{\sigma }_8$ tension with the Planck15/$\Lambda$CDM determination and implications for modified gravity theories
• Hyper Suprime-Cam Year 3 Results: Cosmology from Cosmic Shear Power Spectra
• Arbitrating the $S_8$ discrepancy with growth rate measurements from Redshift-Space Distortions
• A non-linear solution to the $S_8$ tension?
• DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys
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• Constraints from thermal Sunyaev-Zeldovich cluster counts and power spectrum combined with CMB
• Quantifying tensions in cosmological parameters: Interpreting the DES evidence ratio
• Survey geometry and the internal consistency of recent cosmic shear measurements
• KiDS+GAMA: Intrinsic alignment model constraints for current and future weak lensing cosmology
• Internal Robustness of Growth Rate data
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• Observational constraints on the deceleration parameter in a tilted universe
• Cosmological Measurements from Angular Power Spectra Analysis of BOSS DR12 Tomography
• CMB tensions with low-redshift $H_0$ and $S_8$ measurements: impact of a redshift-dependent type-Ia supernovae intrinsic luminosity
• Multidimensionality of the Hubble tension: the roles of ${\Omega }_m$ and ${\omega }_c$
• Time-varying neutrino mass from a supercooled phase transition: current cosmological constraints and impact on the ${\Omega }_m$-${\sigma }_8$ plane
• KiDS-1000: Cosmology with improved cosmic shear measurements
• Quantifying Suspiciousness Within Correlated Data Sets
• Preparing for the Cosmic Shear Data Flood: Optimal Data Extraction and Simulation Requirements for Stage IV Dark Energy Experiments
• Mixed dark matter: matter power spectrum and halo mass function
• Testing Shear Recovery with Field Distortion
• Consistency of Modified Gravity with a decreasing $G_{\mathrm{eff}}(z)$ in a $\Lambda$CDM background
• An exploration of an early gravity transition in light of cosmological tensions
• KiDS-Legacy: Consistency of cosmic shear measurements and joint cosmological constraints with external probes
• Testing $\Lambda$CDM cosmology in a binned universe: anomalies in the deceleration parameter
• Hints for possible low redshift oscillation around the best fit $\Lambda$CDM model in the expansion history of the Universe
• A Bayesian quantification of consistency in correlated datasets
• Constraints on Cosmology and Baryonic Feedback with the Deep Lens Survey Using Galaxy-Galaxy and Galaxy-Mass Power Spectra
• Self-calibration and robust propagation of photometric redshift distribution uncertainties in weak gravitational lensing
• On the degeneracy between baryon feedback and massive neutrinos as probed by matter clustering and weak lensing
• $\Lambda$CDM is alive and well
• Implications for the missing low-mass galaxies (satellites) problem from cosmic shear
• Traces of Anisotropic Quasi-Regular Structure in the SDSS Data
• Dusty Clump Survival in Supernova Ejecta: Dust-Mediated Growth vs. Crushing by the Reverse Shock