Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak

Abstract

The baryon acoustic oscillations are a promising route to the precision measure of the cosmological distance scale and hence the measurement of the time evolution of dark energy. We show that the non-linear degradation of the acoustic signature in the correlations of low-redshift galaxies is a correctable process. By suitable reconstruction of the linear density field, one can sharpen the acoustic peak in the correlation function or, equivalently, restore the higher harmonics of the oscillations in the power spectrum. With this, one can achieve better measurements of the acoustic scale for a given survey volume. Reconstruction is particularly effective at low redshift, where the non-linearities are worse but where the dark energy density is highest. At z=0.3, we find that one can reduce the sample variance error bar on the acoustic scale by at least a factor of 2 and in principle by nearly a factor of 4. We discuss the significant implications our results have for the design of galaxy surveys aimed at measuring the distance scale through the acoustic peak.

arXiv comment5 pages, LaTeX. Submitted to the Astrophysical Journal

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• Cosmology at high redshift -- a probe of fundamental physics
• Constraints on the $\Lambda$CDM model with redshift tomography
• Two-point statistics without bins: A continuous-function generalization of the correlation function estimator for large-scale structure
• Tests of Acoustic Scale Shifts in Halo-based Mock Galaxy Catalogues
• Perturbative Gaussianizing transforms for cosmological fields
• Improved two-point correlation function estimates using glass-like distributions as a reference sample
• Investigating the Possibility of a Turning Point in the Dark Energy Equation of State
• Model Selection using Baryon Acoustic Oscillations in the Final SDSS-IV Release
• Fisher forecast for the BAO measurements from the CSST spectroscopic and photometric galaxy clustering
• Cosmic void exclusion models and their impact on the distance scale measurements from large scale structure
• The Two-Point Correlation Function of Gamma-ray Bursts
• The environmental dependence of the baryon acoustic peak in the Baryon Oscillation Spectroscopic Survey CMASS sample
• Cosmic Void Baryon Acoustic Oscillation Measurement: Evaluation of Sensitivity to Selection Effects
• Extended Fast Action Minimisation method: application to SDSS-DR12 Combined Sample
• Straightening the Ruler: Field-Level Inference of the BAO Scale with LEFTfield
• Effect of Peak Absolute Magnitude of Type Ia Supernovae and Sound Horizon Values on Hubble Tension using DESI results
• $H_0$ Without the Sound Horizon (or Supernovae): A 2% Measurement in DESI DR1
• On the origin of the BAOtr-DESI tension
• Studying Interstellar Turbulence Driving Scales using the Bispectrum
• Optimizing the Recovery of Fisher Information in the Dark Matter Power Spectrum
• A Pop III generated dust screen at z~16
• Updated reduced CMB data and constraints on cosmological parameters
• Neural Network Reconstruction of Non-Gaussian Initial Conditions from Dark Matter Halos
• Extending evolution mapping to massive neutrinos with COMET
• Baryon Acoustic Oscillations analyses with Density-Split Statistics
• Detecting Baryon Acoustic Oscillations in Dark Matter from Kinematic Weak Lensing Surveys
• Updated neutrino mass constraints from galaxy clustering and CMB lensing-galaxy cross-correlation measurements
• Lagrangian displacement field estimators in cosmology
• A cosmic speed-trap: a gravity-independent test of cosmic acceleration using baryon acoustic oscillations
• Tracing the environmental history of observed galaxies via extended fast action minimization method
• Accelerating BAO Scale Fitting Using Taylor Series
• Dipole Distortions in the Intergalactic Medium
• Largest scales from the largest galaxy surveys: the pseudo Karhunen-Loève method
• How to optimally combine pre-reconstruction full shape and post-reconstruction BAO signals
• An analytic approximation to the covariance between pre- and post-reconstruction galaxy two-point statistics
• Faint galaxies in the Zone of Avoidance revealed by JWST/NIRCam
• On the baryon acoustic oscillation amplitude as a probe of radiation density
• New tests of dark sector interactions from the full-shape galaxy power spectrum
• Constraining cosmology with N-body simulations for future spectroscopic galaxy surveys at $2\le z\le 3$
• Testing the robustness of the BAO determination in the presence of massive neutrinos
• Systematic treatment of non-linear effects in Baryon Acoustic Oscillations
• Model-agnostic interpretation of 10 billion years of cosmic evolution traced by BOSS and eBOSS data
• Testing Large-Scale Structure Measurements Against Fisher Matrix Predictions
• Iterative reconstruction excursions for Baryon Acoustic Oscillations and beyond
• Laguerre reconstruction of the BAO feature in halo-based mock galaxy catalogues
• Differentiable Fuzzy Cosmic-Web for Field Level Inference
• Constraining effective neutrino species with bispectrum of large scale structures
• Searching optimal scales for reconstructing cosmological initial conditions using convolutional neural networks