Inference of matter power spectrum at z=0 using DESI DR1 Full-Shape data

Abstract

Measurements of galaxy distributions at large cosmic distances capture clustering from the past. In this study, we use a cosmological model to translate these observations into the present-day galaxy distribution. Specifically, we reconstruct the 3D matter power spectrum at redshift $z=0$ using Dark Energy Spectroscopic Instrument (DESI) Year 1 (DR1) galaxy clustering data and Cosmic Microwave Background (CMB) observations, assuming the $\Lambda \text{CDM}$ model, and compare it to the result assuming the $w_0{w}_a\text{CDM}$ model. Building on previous state-of-the-art methods, we apply Effective Field Theory (EFT) modelling of the galaxy power spectrum to account for small-scale effects in the 2-point statistics of galaxy data. The EFT approach offers a more robust methodology than traditional methods for modelling the galaxy power spectrum from galaxy clustering data, which can be used to test the consistency of the assumed cosmological model. By incorporating both CMB and galaxy clustering data across a range of redshifts, we can identify discrepancies between the datasets, which would indicate potential inaccuracies in the assumed expansion history. While previous studies have shown consistency with $\Lambda \text{CDM}$, this work extends the analysis with higher-quality data to further test the expansion histories of both $\Lambda \text{CDM}$ and $w_0{w}_a\text{CDM}$. Our findings show that both $\Lambda \text{CDM}$ and $w_0{w}_a\text{CDM}$ provide consistent fits to the matter power spectrum recovered from DESI DR1 data.

arXiv comment24 pages, 6 figures, 2 tables

References in corpus (46)

• Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
• Measurements of Omega and Lambda from 42 High-Redshift Supernovae
• Efficient Computation of CMB anisotropies in closed FRW models
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• 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
• H0LiCOW XIII. A 2.4% measurement of $H_0$ from lensed quasars: $5.3\sigma$ tension between early and late-Universe probes
• Planck 2018 results. V. CMB power spectra and likelihoods
• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• The Effective Field Theory of Cosmological Large Scale Structures
• Measurements of the Hubble Constant: Tensions in Perspective
• DESI DR2 Results II: Measurements of Baryon Acoustic Oscillations and Cosmological Constraints
• Cosmological Constraints from the Clustering of the Sloan Digital Sky Survey DR7 Luminous Red Galaxies
• Planck 2018 results. IV. Diffuse component separation
• Calibration of the Tip of the Red Giant Branch (TRGB)
• Dark Energy Survey Year 3 Results: Cosmology from Cosmic Shear and Robustness to Modeling Uncertainty
• The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters
• Cosmology with Phase 1 of the Square Kilometre Array; Red Book 2018: Technical specifications and performance forecasts
• DESI Bright Galaxy Survey: Final Target Selection, Design, and Validation
• The Spectroscopic Data Processing Pipeline for the Dark Energy Spectroscopic Instrument
• Target Selection and Validation of DESI Luminous Red Galaxies
• Target Selection and Validation of DESI Quasars
• EZmocks: extending the Zel'dovich approximation to generate mock galaxy catalogues with accurate clustering statistics
• DESI 2024 VII: Cosmological Constraints from the Full-Shape Modeling of Clustering Measurements
• Target Selection and Validation of DESI Emission Line Galaxies
• Cosmological Redshift Distortion of Correlation Functions as a Probe of the Density Parameter and the Cosmological Constant
• The Target-selection Pipeline for the Dark Energy Spectroscopic Instrument
• Separating the Early Universe from the Late Universe: cosmological parameter estimation beyond the black box
• Redshift-Space Distortions in Lagrangian Perturbation Theory
• Consistent Modeling of Velocity Statistics and Redshift-Space Distortions in One-Loop Perturbation Theory
• The Atacama Cosmology Telescope: a measurement of the primordial power spectrum
• Constraining Anisotropic Baryon Oscillations
• KiDS-Legacy: Cosmological constraints from cosmic shear with the complete Kilo-Degree Survey
• Matter power spectrum: from Ly$\alpha$ forest to CMB scales
• Probing the Small-Scale Matter Power Spectrum with Large-Scale 21-cm Data
• Interpreting measurements of the anisotropic galaxy power spectrum
• The BOSS Lyman-alpha Forest Sample from SDSS Data Release 9
• DESI 2024 II: Sample Definitions, Characteristics, and Two-point Clustering Statistics
• DESI 2024 V: Full-Shape Galaxy Clustering from Galaxies and Quasars
• SPT-3G D1: CMB temperature and polarization power spectra and cosmology from 2019 and 2020 observations of the SPT-3G Main field
• New Roads to the Small-Scale Universe: Measurements of the Clustering of Matter with the High-Redshift UV Galaxy Luminosity Function
• The Atacama Cosmology Telescope: Cosmology from cross-correlations of unWISE galaxies and ACT DR6 CMB lensing
• $5\sigma$ tension between Planck cosmic microwave background and eBOSS Lyman-alpha forest and constraints on physics beyond $\Lambda$CDM
• Mitigation of DESI fiber assignment incompleteness effect on two-point clustering with small angular scale truncated estimators
• Analytical and EZmock covariance validation for the DESI 2024 results
• Modelling galaxy clustering in redshift space with a Lagrangian bias formalism and $N$-body simulations

Cited by in corpus (1)

• The Manticore Project II: Bayesian digital twins of cosmic structure across the SDSS and BOSS volumes