DES Y3 cosmic shear down to small scales: constraints on cosmology and baryons

Abstract

We present the first analysis of cosmic shear measured in DES Y3 that employs the entire range of angular scales in the data. To achieve this, we build upon recent advances in the theoretical modelling of weak lensing provided by a combination of $N$-body simulations, physical models of baryonic processes, and neural networks. Specifically, we use BACCOemu to model the linear and nonlinear matter power spectrum including baryonic physics, allowing us to robustly exploit scales smaller than those used by the DES Collaboration. We show that the additional data produce cosmological parameters that are tighter but consistent with those obtained from larger scales, while also constraining the distribution of baryons. In particular, we measure the mass scale at which haloes have lost half of their gas, $\log M_{\mathrm{c}}=14.38_{-0.56}^{+0.60}\log (h^{-1}{\mathrm{M}}_{\odot })$, and a parameter that quantifies the weighted amplitudes of the present-day matter inhomogeneities, $S_8=0.799_{-0.015}^{+0.023}$. Our constraint on $S_8$ is statistically compatible with that inferred from the Planck satellite's data at the $0.9\sigma$ level. We find instead a $1.4\sigma$ shift in comparison to that from the official DES Y3 cosmic shear, because of different choices in the modelling of intrinsic alignment, non-linearities, baryons, and lensing shear ratios. We conclude that small scales in cosmic shear data contain valuable astrophysical and cosmological information and thus should be included in standard analyses.

arXiv commentAccepted for publication on A&A

References in corpus (98)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• The EAGLE project: Simulating the evolution and assembly of galaxies and their environments
• LSST: from Science Drivers to Reference Design and Anticipated Data Products
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• First results from the IllustrisTNG simulations: matter and galaxy clustering
• First results from the IllustrisTNG simulations: the stellar mass content of groups and clusters of galaxies
• The EAGLE simulations of galaxy formation: calibration of subgrid physics and model variations
• Chandra sample of nearby relaxed galaxy clusters: mass, gas fraction, and mass-temperature relation
• Properties of galaxies reproduced by a hydrodynamic simulation
• Dark Energy Survey Year 3 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• Tensions between the Early and the Late Universe
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• Revising the Halofit Model for the Nonlinear Matter Power Spectrum
• The Dark Energy Camera
• The Dark Energy Survey: more than dark energy - an overview
• The physics driving the cosmic star formation history
• KiDS-1000 Cosmology: Cosmic shear constraints and comparison between two point statistics
• KiDS-1000 Cosmology: Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints
• Intrinsic alignment-lensing interference as a contaminant of cosmic shear
• Cosmology from cosmic shear power spectra with Subaru Hyper Suprime-Cam first-year data
• PolyChord: nested sampling for cosmology
• The BAHAMAS project: Calibrated hydrodynamical simulations for large-scale structure cosmology
• Dark energy constraints from cosmic shear power spectra: impact of intrinsic alignments on photometric redshift requirements
• The EAGLE simulations of galaxy formation: public release of halo and galaxy catalogues
• Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Data Calibration
• An accurate halo model for fitting non-linear cosmological power spectra and baryonic feedback models
• Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Modeling Uncertainty
• HMcode-2020: Improved modelling of non-linear cosmological power spectra with baryonic feedback
• Stellar and total baryon mass fractions in groups and clusters since redshift 1
• Quantifying the effect of baryon physics on weak lensing tomography
• Galaxy Cluster Baryon Fractions Revisited
• CosmoSIS: modular cosmological parameter estimation
• Core Cosmology Library: Precision Cosmological Predictions for LSST
• Discriminating weak lensing from intrinsic spin correlations using the curl-gradient decomposition
• The Coyote Universe Extended: Precision Emulation of the Matter Power Spectrum
• Analysis of two-point statistics of cosmic shear: I. Estimators and covariances
• The Dark Energy Survey Image Processing Pipeline
• Concordance and Discordance in Cosmology
• Beyond linear galaxy alignments
• Reconciling CMB and structure growth measurements with dark energy interactions
• Calibration of the galaxy cluster M_500-Y_X relation with XMM-Newton
• A new method to quantify the effects of baryons on the matter power spectrum
• Dark Energy Survey Year 3 Results: Photometric Data Set for Cosmology
• The BACCO Simulation Project: Exploiting the full power of large-scale structure for cosmology
• Arbitrating the $S_8$ discrepancy with growth rate measurements from Redshift-Space Distortions
• Quantifying baryon effects on the matter power spectrum and the weak lensing shear correlation
• The impact of baryons on the matter power spectrum from the Horizon-AGN cosmological hydrodynamical simulation
• Dark Energy Survey Year 3 Results: Weak Lensing Shape Catalogue
• A non-linear solution to the $S_8$ tension?
• Dark Energy Survey Year 3 Results: Redshift Calibration of the Weak Lensing Source Galaxies
• The BAHAMAS project: the CMB--large-scale structure tension and the roles of massive neutrinos and galaxy formation
• Exploring the effects of galaxy formation on matter clustering through a library of simulation power spectra
• Euclid preparation: IX. EuclidEmulator2 -- Power spectrum emulation with massive neutrinos and self-consistent dark energy perturbations
• FAST-PT: a novel algorithm to calculate convolution integrals in cosmological perturbation theory
• A rapid transition of $G_{\mathrm{eff}}$ at $z_t\simeq 0.01$ as a solution of the Hubble and growth tensions
• Modeling baryonic physics in future weak lensing surveys
• Baryons, Neutrinos, Feedback and Weak Gravitational Lensing
• Accounting for baryonic effects in cosmic shear tomography: Determining a minimal set of nuisance parameters using PCA
• Quantifying tensions in cosmological parameters: Interpreting the DES evidence ratio
• Dark Energy Survey Year 3 Results: Covariance Modelling and its Impact on Parameter Estimation and Quality of Fit
• Modelling the large scale structure of the Universe as a function of cosmology and baryonic physics
• anesthetic: nested sampling visualisation
• Dark Energy Survey Year 1 Results: Constraints on Intrinsic Alignments and their Colour Dependence from Galaxy Clustering and Weak Lensing
• Evidence for suppression of structure growth in the concordance cosmological model
• The growth of density perturbations in the last $\sim$10 billion years from tomographic large-scale structure data
• The Limits of Cosmic Shear
• Emulation of baryonic effects on the matter power spectrum and constraints from galaxy cluster data
• A hydrodynamical halo model for weak-lensing cross correlations
• Baryonic effects for weak lensing. Part I. Power spectrum and covariance matrix
• Joint constraints on cosmology and the impact of baryon feedback: combining KiDS-1000 lensing with the thermal Sunyaev-Zeldovich effect from Planck and ACT
• The 2-degree Field Lensing Survey: design and clustering measurements
• FAST-PT II: an algorithm to calculate convolution integrals of general tensor quantities in cosmological perturbation theory
• The impact of the observed baryon distribution in haloes on the total matter power spectrum
• Non-Gaussian estimates of tensions in cosmological parameters
• Cosmological constraints from the CFHTLenS shear measurements using a new, accurate and flexible way of predicting nonlinear mass clustering
• Simultaneous modelling of matter power spectrum and bispectrum in the presence of baryons
• The BACCO simulation project: biased tracers in real space
• Constraining baryonic feedback and cosmology with weak-lensing, X-ray, and kinematic Sunyaev-Zeldovich observations
• How to add massive neutrinos to your $\Lambda$CDM simulation -- extending cosmology rescaling algorithms
• The Dark Energy Survey Year 3 and eBOSS: constraining galaxy intrinsic alignments across luminosity and colour space
• Dark Energy Survey Year 3 Results: Exploiting small-scale information with lensing shear ratios
• Strong detection of the CMB lensingxgalaxy weak lensingcross-correlation from ACT-DR4,PlanckLegacy and KiDS-1000
• Constraining the Baryonic Feedback with Cosmic Shear Using the DES Year-3 Small-Scale Measurements
• 3\%-accurate predictions for the clustering of dark matter, haloes and subhaloes, over a wide range of cosmologies and scales
• Robust sampling for weak lensing and clustering analyses with the Dark Energy Survey
• Non-universality of the mass function: dependence on the growth rate and power spectrum shape
• The Bacco Simulation Project: Bacco Hybrid Lagrangian Bias Expansion Model in Redshift Space
• Constraints on dark matter to dark radiation conversion in the late universe with DES-Y1 and external data
• Accelerating Large-Scale-Structure data analyses by emulating Boltzmann solvers and Lagrangian Perturbation Theory
• The galaxy formation origin of the lensing is low problem
• The Atacama Cosmology Telescope: Summary of DR4 and DR5 Data Products and Data Access
• Consistent and simultaneous modelling of galaxy clustering and galaxy-galaxy lensing with Subhalo Abundance Matching
• Modelling galaxy clustering in redshift space with a Lagrangian bias formalism and $N$-body simulations
• Constraining dark matter decays with cosmic microwave background and weak lensing shear observations
• The cosmology dependence of the concentration-mass-redshift relation
• On constraining Cosmology and the Halo Mass Function with Weak Gravitational Lensing

Cited by in corpus (30)

• The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• DES Y3 + KiDS-1000: Consistent cosmology combining cosmic shear surveys
• Cosmic shear with small scales: DES-Y3, KiDS-1000 and HSC-DR1
• $5\sigma$ tension between Planck cosmic microwave background and eBOSS Lyman-alpha forest and constraints on physics beyond $\Lambda$CDM
• The FLAMINGO project: Baryon effects on the matter power spectrum
• $\Lambda$CDM is alive and well
• HYMALAIA: A Hybrid Lagrangian Model for Intrinsic Alignments
• Towards alleviating the $H_0$ and $S_8$ tensions with Early Dark Energy - Dark Matter drag
• Probing the two-body decaying dark matter scenario with weak lensing and the cosmic microwave background
• Status of the $S_8$ Tension: A 2026 Review of Probe Discrepancies
• Dark Energy Survey Year 3: Blue Shear
• On the degeneracies between baryons, massive neutrinos and f(R) gravity in Stage IV cosmic shear analyses
• Probing Dark Relativistic Species and Their Interactions with Dark Matter through CMB and 21cm surveys
• Interacting dark energy constraints from the full-shape analyses of BOSS DR12 and DES Year 3 measurements
• Baryonification extended to thermal Sunyaev Zeldovich
• A new "temperature inversion" estimator to detect CMB patchy screening by large-scale structure
• Map-level baryonification: unified treatment of weak lensing two-point and higher-order statistics
• Cosmological constraints from galaxy clustering and galaxy-galaxy lensing with extended SubHalo Abundance Matching
• Calibrating baryonic effects in cosmic shear with external data in the LSST era
• Probabilistic Estimators of Lagrangian Shape Biases: Universal Relations and Physical Insights
• A 1% accurate method to include baryonic effects in galaxy-galaxy lensing models
• syren-baryon: Analytic emulators for the impact of baryons on the matter power spectrum
• Disentangling the Halo: Joint Model for Measurements of the Kinetic Sunyaev-Zeldovich Effect and Galaxy-Galaxy Lensing
• KiDS-1000: Detection of deviations from a purely cold dark matter power spectrum with tomographic weak gravitational lensing
• A frequentist view on the two-body decaying dark matter model
• Deciphering Baryonic Feedback from ACT tSZ Galaxy Clusters
• Probing baryonic feedback with fast radio bursts: joint analyses with cosmic shear and galaxy clustering
• Thermal Sunyaev-Zel'dovich effect at the core of CL J1226.9+3332 revealed by NOEMA
• Bound or blown: the fate of hot gas in galaxy groups