Compressed baryon acoustic oscillation analysis is robust to modified-gravity models

Abstract

We study the robustness of the baryon acoustic oscillation (BAO) analysis to the underlying cosmological model. We focus on testing the standard BAO analysis that relies on the use of a template. These templates are constructed assuming a fixed fiducial cosmological model and used to extract the location of the acoustic peaks. Such "compressed analysis" had been shown to be unbiased when applied to the $\Lambda$CDM model and some of its extensions. However, it has not been known whether this type of analysis introduces biases in a wider range of cosmological models where the template may not fully capture relevant features in the BAO signal. In this study, we apply the compressed analysis to noiseless mock power spectra that are based on Horndeski models, a broad class of modified-gravity theories specified with eight additional free parameters. We study the precision and accuracy of the BAO peak-location extraction assuming DESI, DESI II, and MegaMapper survey specifications. We find that the bias in the extracted peak locations is negligible; for example, it is less than 10% of the statistical error for even the proposed future MegaMapper survey. Our findings indicate that the compressed BAO analysis is remarkably robust to the underlying cosmological model.

30 pages, 8 Figures, published version

References in corpus (50)

• emcee: The MCMC Hammer
• Detection of the Baryon Acoustic Peak in the Large-Scale Correlation Function of SDSS Luminous Red Galaxies
• Modified Gravity and Cosmology
• 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 galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• Baryon Acoustic Oscillations in the Sloan Digital Sky Survey Data Release 7 Galaxy Sample
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 9 Spectroscopic Galaxy Sample
• Healthy theories beyond Horndeski
• A 2% Distance to z=0.35 by Reconstructing Baryon Acoustic Oscillations - I : Methods and Application to the Sloan Digital Sky Survey
• Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak
• The Effective Field Theory of Dark Energy
• Fingers of God
• General second order scalar-tensor theory, self tuning, and the Fab Four
• On the Robustness of the Acoustic Scale in the Low-Redshift Clustering of Matter
• Cosmological Parameters from the BOSS Galaxy Power Spectrum
• Maximal freedom at minimum cost: linear large-scale structure in general modifications of gravity
• Essential Building Blocks of Dark Energy
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic correlation function between redshifts 0.6 and 1
• Dark Energy and Modified Gravity in Degenerate Higher-Order Scalar-Tensor (DHOST) theories: a review
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from the anisotropic power spectrum of the Quasar sample between redshift 0.8 and 2.2
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in Fourier-space
• Effective Field Theory of Cosmic Acceleration: an implementation in CAMB
• The Baryonic Acoustic Feature and Large-Scale Clustering in the SDSS LRG Sample
• Combining Full-Shape and BAO Analyses of Galaxy Power Spectra: A 1.6% CMB-independent constraint on H0
• Cosmology from large-scale structure: Constraining $\Lambda$CDM with BOSS
• Effective Field Theory of Cosmic Acceleration: constraining dark energy with CMB data
• Efficient Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
• Gaussian covariance matrices for anisotropic galaxy clustering measurements
• A 2% Distance to z=0.35 by Reconstructing Baryon Acoustic Oscillations - II: Fitting Techniques
• Time-Sliced Perturbation Theory for Large Scale Structure I: General Formalism
• Reconstruction within the Zeldovich approximation
• Cosmological parameter constraints for Horndeski scalar-tensor gravity
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: theoretical systematics and Baryon Acoustic Oscillations in the galaxy correlation function
• ShapeFit: extracting the power spectrum shape information in galaxy surveys beyond BAO and RSD
• Modeling the reconstructed BAO in Fourier space
• Testing Gravity Using Galaxy Clusters: New Constraints on Beyond Horndeski Theories
• The VLT LBG Redshift Survey - III. The clustering and dynamics of Lyman-break galaxies at z ~ 3
• The Impact of the Fiducial Cosmology Assumption on BAO Cosmological Parameter Inference
• Robustness of baryon acoustic oscillation constraints for early-Universe modifications to $\Lambda$CDM
• The road ahead of Horndeski: cosmology of surviving scalar-tensor theories
• Measuring the propagation speed of gravitational waves with LISA
• Measuring the 2D Baryon Acoustic Oscillation signal of galaxies in WiggleZ: Cosmological constraints
• The Linear Point: A cleaner cosmological standard ruler
• New constraints on cosmological modified gravity theories from anisotropic three-point correlation functions of BOSS DR12 galaxies
• Sweeping Horndeski Canvas: New Growth-Rate Parameterization for Modified-Gravity Theories
• Cosmological Fisher forecasts for next-generation spectroscopic surveys

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• DESI 2024 VI: Cosmological Constraints from the Measurements of Baryon Acoustic Oscillations
• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• DESI 2024 III: Baryon Acoustic Oscillations from Galaxies and Quasars
• Model-agnostic assessment of dark energy after DESI DR1 BAO
• Phantom matter: a challenging solution to the cosmological tensions
• Modified Gravity Constraints from the Full Shape Modeling of Clustering Measurements from DESI 2024
• ${\Lambda }_{\mathrm{s}}$CDM cosmology: Alleviating major cosmological tensions by predicting standard neutrino properties
• Fiducial-Cosmology-dependent systematics for the DESI 2024 BAO Analysis
• Non-minimally coupled gravity constraints from DESI DR2 data
• Joint Analysis of Constraints on f(R) Parametrization from Recent Cosmological Observations
• KiDS-Legacy: Constraints on Horndeski gravity from weak lensing combined with galaxy clustering and cosmic microwave background anisotropies
• Sector-Resolved Bayesian Model Averaging for DESI-Era Cosmology