Dark Energy Survey: DESI-Independent Angular BAO Measurement

Abstract

We present a measurement of the angular baryon acoustic oscillation (BAO) scale from the completed Dark Energy Survey (DES) dataset excluding the area of overlap with the Dark Energy Spectroscopic Instrument (DESI). We follow the same methodology and validation process as in the DES year 6 (Y6) BAO analysis. We interpret the impact of this measurement in the context of the statistical preference for $w_0{w}_a$ cold dark matter (CDM) over $\Lambda$CDM when combined with DES Y5 Type Ia supernovae (SN), Planck Cosmic Microwave Background (CMB) and DESI BAO. Based on our previous work, using the full Y6 DES BAO sample, in combination with SN, CMB and DESI data release 1 (DR1) BAO, added $0.3\sigma$ in this preference (from $3.7\sigma$ to $4.0\sigma$), but this ignored possible correlations between datasets. Using our new DESI-independent DES BAO likelihood instead, we find a smaller increase in the statistical preference for $w_0{w}_a$CDM, from $3.7\sigma$ to $3.8\sigma$ when using DESI DR1 BAO, and from $4.0\sigma$ to $4.1\sigma$ when updating to the more recent DESI data release 2 (DR2) BAO. These significances reduce to $3.1\sigma$ when using the new calibrated DES SN-Dovekie. Alongside this work, we publicly release \texttt{BAOfit\_wtheta}, the BAO fitting code for the angular correlation function used in the DES Y6 BAO analysis.

22 pages, 6 figures

References in corpus (66)

• Efficient Computation of CMB anisotropies in closed FRW models
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The 6dF Galaxy Survey: Baryon Acoustic Oscillations and the Local Hubble Constant
• The 2dF Galaxy Redshift Survey: Power-spectrum analysis of the final dataset and cosmological implications
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• Revising the Halofit Model for the Nonlinear Matter Power Spectrum
• Planck 2018 results. V. CMB power spectra and likelihoods
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• The Dark Energy Camera
• The WiggleZ Dark Energy Survey: mapping the distance-redshift relation with baryon acoustic oscillations
• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• Baryon Acoustic Oscillations in the Ly-α forest of BOSS quasars
• Quasar-Lyman $\alpha$ Forest Cross-Correlation from BOSS DR11 : Baryon Acoustic Oscillations
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• CMB power spectrum parameter degeneracies in the era of precision cosmology
• PolyChord: next-generation nested sampling
• Nonlinear Evolution of Baryon Acoustic Oscillations
• Cosmological Parameters from the BOSS Galaxy Power Spectrum
• Measurement of BAO correlations at $z=2.3$ with SDSS DR12 \lya-Forests
• The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: First measurement of Baryon Acoustic Oscillations between redshift 0.8 and 2.2
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Baryon acoustic oscillations with Lyman-$\alpha$ forests
• The WiggleZ Dark Energy Survey: Improved Distance Measurements to z = 1 with Reconstruction of the Baryonic Acoustic Feature
• Massive Neutrinos and the Non-linear Matter Power Spectrum
• CosmoSIS: modular cosmological parameter estimation
• First Cosmology Results using Type Ia Supernovae from the Dark Energy Survey: Constraints on Cosmological Parameters
• GetDist: a Python package for analysing Monte Carlo samples
• Measurement of Baryon Acoustic Oscillations in the Lyman-alpha Forest Fluctuations in BOSS Data Release 9
• DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars
• CosmoLike - Cosmological Likelihood Analyses for Photometric Galaxy Surveys
• The IR-resummed Effective Field Theory of Large Scale Structures
• The WiggleZ Dark Energy Survey: testing the cosmological model with baryon acoustic oscillations at z=0.6
• The MICE Grand Challenge Lightcone Simulation I: Dark matter clustering
• CMB power spectra and cosmological parameters from Planck PR4 with CamSpec
• Time-Sliced Perturbation Theory II: Baryon Acoustic Oscillations and Infrared Resummation
• Dark Energy Survey Year 1 Results: Measurement of the Baryon Acoustic Oscillation scale in the distribution of galaxies to redshift 1
• The MICE Grand Challenge Lightcone Simulation II: Halo and Galaxy catalogues
• SuperNNova: an open-source framework for Bayesian, Neural Network based supernova classification
• The Pantheon+ Analysis: SuperCal-Fragilistic Cross Calibration, Retrained SALT2 Light Curve Model, and Calibration Systematic Uncertainty
• Dark Energy Survey Year 1 Results: Galaxy clustering for combined probes
• Infrared Resummation for Biased Tracers in Redshift Space
• Perturbation theory, effective field theory, and oscillations in the power spectrum
• A Detailed Description of the CamSpec Likelihood Pipeline and a Reanalysis of the Planck High Frequency Maps
• Calibrating the Baryon Oscillation Ruler for Matter and Halos
• Dark Energy Survey Year 3 Results: A 2.7% measurement of Baryon Acoustic Oscillation distance scale at redshift 0.835
• ICE-COLA: Towards fast and accurate synthetic galaxy catalogues optimizing a quasi $N$-body method
• Beyond Limber: Efficient computation of angular power spectra for galaxy clustering and weak lensing
• Galaxy clustering, photometric redshifts and diagnosis of systematics in the DES Science Verification data
• 2D-FFTLog: Efficient computation of real space covariance matrices for galaxy clustering and weak lensing
• Fast and accurate mock catalogue generation for low-mass galaxies
• Dark Energy Survey Year 3 Results: Galaxy clustering and systematics treatment for lens galaxy samples
• The Dark Energy Survey Supernova Program: A Reanalysis Of Cosmology Results And Evidence For Evolving Dark Energy With An Updated Type Ia Supernova Calibration
• Dark Energy Survey Year 1 Results: galaxy mock catalogues for BAO
• Concerning Colour: The Effect of Environment on Type Ia Supernova Colour in the Dark Energy Survey
• Dark Energy Survey: A 2.1% measurement of the angular Baryonic Acoustic Oscillation scale at redshift $z_{\mathrm{eff}}$=0.85 from the final dataset
• Measuring the 2D Baryon Acoustic Oscillation signal of galaxies in WiggleZ: Cosmological constraints
• The Dark Energy Survey 5-year photometrically identified Type Ia Supernovae
• Dark Energy Survey Year 1 Results: Measurement of the Galaxy Angular Power Spectrum
• SALT2 Versus SALT3: Updated Model Surfaces and Their Impacts on Type Ia Supernova Cosmology
• BAO from angular clustering: optimization and mitigation of theoretical systematics
• Optimized Clustering Estimators for BAO Measurements Accounting for Significant Redshift Uncertainty
• Dark Energy Survey Year 3 Results: Measurement of the Baryon Acoustic Oscillations with Three-dimensional Clustering
• Clustering with general photo-$z$ uncertainties: Application to Baryon Acoustic Oscillations
• Dark Energy Survey: Galaxy Sample for the Baryonic Acoustic Oscillation Measurement from the Final Dataset
• Studying baryon acoustic oscillations using photometric redshifts from the DESI Legacy Imaging survey DR9

Cited by in corpus (2)

• Breaking Free from the Swampland of Impossible Universes through the DESI Portal
• Sound Mode and Scale-Dependent Growth in Two-Fluid Dynamical Dark Energy