Cosmological constraints without fingers of God

Abstract

Non-linear redshift-space distortions ("fingers of God") are challenging to model analytically, a fact that limits the applicability of perturbation theory in redshift space as compared to real space. We show how this problem can be mitigated using a new observable, $Q_0$, which can be easily estimated from the redshift space clustering data and is approximately equal to the real space power spectrum. The new statistic does not suffer from fingers of God and can be accurately described with perturbation theory down to $k_{\max }\simeq 0.4h{\text{Mpc}}^{-1}$. It can be straightforwardly included in the likelihood at negligible additional computational cost, and yields noticeable improvements on cosmological parameters compared to standard power spectrum multipole analyses. Using both simulations and observational data from the Baryon Oscillation Spectroscopic Survey, we show that improvements vary from $10\%$ to $100\%$ depending on the cosmological parameter considered, the galaxy sample and the survey volume.

arXiv comment29 pages, 6 figures, minor edits, new BOSS likelihood used, available at github.com/oliverphilcox/full_shape_likelihoods

References in corpus (57)

• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The 3D power spectrum of galaxies from the SDSS
• The DESI Experiment Part I: Science,Targeting, and Survey Design
• Conservative Constraints on Early Cosmology: an illustration of the Monte Python cosmological parameter inference code
• Large-Scale Galaxy Bias
• Cosmological Non-Linearities as an Effective Fluid
• The Effective Field Theory of Cosmological Large Scale Structures
• Redshift-Space Distortions, Pairwise Velocities and Nonlinearities
• Fingers of God
• The Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
• Cosmological Parameters from the BOSS Galaxy Power Spectrum
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Anisotropic galaxy clustering in Fourier-space
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: mock galaxy catalogues for the BOSS Final Data Release
• The Clustering of Galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Including covariance matrix errors
• Constraining Early Dark Energy with Large-Scale Structure
• Non-linear perturbation theory extension of the Boltzmann code CLASS
• Equivalence Principle and the Baryon Acoustic Peak
• Combining Full-Shape and BAO Analyses of Galaxy Power Spectra: A 1.6% CMB-independent constraint on H0
• Fast Estimators for Redshift-Space Clustering
• A Measurement of the Quadrupole Power Spectrum in the Clustering of the 2dF QSO Survey
• Time-Sliced Perturbation Theory II: Baryon Acoustic Oscillations and Infrared Resummation
• Halo Stochasticity from Exclusion and non-linear Clustering
• The power spectrum of galaxies in the 2dF 100k redshift survey
• Blinded challenge for precision cosmology with large-scale structure: results from effective field theory for the redshift-space galaxy power spectrum
• A Lagrangian effective field theory
• Efficient Cosmological Analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
• Limits on $w$CDM from the EFTofLSS with the PyBird code
• Cosmological Parameters and Neutrino Masses from the Final Planck and Full-Shape BOSS Data
• Infrared Resummation for Biased Tracers in Redshift Space
• Redshift-Space Distortions in Lagrangian Perturbation Theory
• Consistent Modeling of Velocity Statistics and Redshift-Space Distortions in One-Loop Perturbation Theory
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Cosmological implications of the Fourier space wedges of the final sample
• Measuring neutrino masses with large-scale structure: Euclid forecast with controlled theoretical error
• Modeling Biased Tracers at the Field Level
• Galaxy Power Spectrum Multipoles Covariance in Perturbation Theory
• Constraints on the curvature of the Universe and dynamical dark energy from the Full-shape and BAO data
• Cosmological constraints from BOSS with analytic covariance matrices
• The Outer Rim Simulation: A Path to Many-Core Supercomputers
• An optimal FFT-based anisotropic power spectrum estimator
• Cubic Halo Bias in Eulerian and Lagrangian Space
• Improving measurements of H(z) and Da(z) by analyzing clustering anisotropies
• On the EFT of Large Scale Structures in Redshift Space
• Precision analysis of the redshift-space galaxy bispectrum
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: exploring the Halo Occupation Distribution model for Emission Line Galaxies
• The Real Space Power Spectrum of the PSCz Survey from 0.01 to 300 h/Mpc
• Determining the Hubble Constant without the Sound Horizon: Measurements from Galaxy Surveys
• Redshift Space Distortions in the Effective Field Theory of Large Scale Structures
• Exploring redshift-space distortions in large-scale structure
• Cosmological constraints from the power spectrum of eBOSS emission line galaxies
• Fewer Mocks and Less Noise: Reducing the Dimensionality of Cosmological Observables with Subspace Projections
• Modeling Galaxies in Redshift Space at the Field Level
• Optimizing large-scale structure data analysis with the theoretical error likelihood
• Cosmology Without Windows: Quadratic Estimators for the Galaxy Power Spectrum
• Large scale structure from viscous dark matter
• Time-sliced perturbation theory with primordial non-Gaussianity and effects of large bulk flows on inflationary oscillating features
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: N-body Mock Challenge for the eBOSS Emission Line Galaxy Sample
• Luminous Red Galaxy Halo Density Field Reconstruction and Application to Large Scale Structure Measurements

Cited by in corpus (33)

• Constraints on Multi-Field Inflation from the BOSS Galaxy Survey
• Constraints on Single-Field Inflation from the BOSS Galaxy Survey
• Cosmology with the Galaxy Bispectrum Multipoles: Optimal Estimation and Application to BOSS Data
• Ultra-light axions and the $S_8$ tension: joint constraints from the cosmic microwave background and galaxy clustering
• The state of the dark energy equation of state circa 2023
• Determining the Hubble Constant without the Sound Horizon: A $3.6\%$ Constraint on $H_0$ from Galaxy Surveys, CMB Lensing and Supernovae
• Constraints on modified gravity from the BOSS galaxy survey
• Cosmological inference from the EFTofLSS: the eBOSS QSO full-shape analysis
• Self-Interacting Neutrinos in Light of Large-Scale Structure Data
• Cosmological constraints from the power spectrum of eBOSS quasars
• Full-shape BOSS constraints on dark matter interacting with dark radiation and lifting the $S_8$ tension
• Updating non-standard neutrinos properties with Planck-CMB data and full-shape analysis of BOSS and eBOSS galaxies
• Observational constraints on early dark energy
• The two-mode puzzle: Confronting self-interacting neutrinos with the full shape of the galaxy power spectrum
• A Parameter-Masked Mock Data Challenge for Beyond-Two-Point Galaxy Clustering Statistics
• Testing signatures of phantom crossing through full-shape galaxy clustering analysis
• The Power of Locality: Primordial Non-Gaussianity at the Map Level
• Taming redshift-space distortion effects in the EFTofLSS and its application to data
• Strong constraints on a simple self-interacting neutrino cosmology
• Cosmological constraints from the cross-correlation of DESI Luminous Red Galaxies with CMB lensing from Planck PR4 and ACT DR6
• Studying large-scale structure probes of modified gravity with COLA
• A critical discussion on the $H_0$ tension
• Improving precision and accuracy in cosmology with model-independent spectrum and bispectrum
• Exploring neutrino interactions in light of present and upcoming galaxy surveys
• Cosmology from Planck CMB Lensing and DESI DR1 Quasar Tomography
• Bounds on Velocity-Dependent Dark Matter-Baryon Scattering from Large-Scale Structure
• Selecting samples of galaxies with fewer Fingers-of-God
• Reducing nuisance prior sensitivity via non-linear reparameterization, with application to EFT analyses of large-scale structure
• Updated neutrino mass constraints from galaxy clustering and CMB lensing-galaxy cross-correlation measurements
• The Effective Field Theory of Large Scale Structure for Mixed Dark Matter Scenarios
• New tests of dark sector interactions from the full-shape galaxy power spectrum
• On the range of validity of perturbative models for galaxy clustering and its uncertainty
• Cosmology with the Redshift-Space Galaxy Bispectrum Monopole at One-Loop Order