Tomographic Constraints on Gravity from Angular Redshift Fluctuations in the Late Universe

Abstract

Fluctuations in sky maps of the galaxy redshifts, dubbed as angular redshift fluctuations (ARF), contain precise information about the growth rate of structures and the nature of gravity in the Universe. Specifically, ARF constrain the combination of cosmological parameters $H/H_{0}f{\sigma }_8(z)$, while being an intrinsically tomographic probe and largely insensitive to many observational systematic errors, all this without requiring the assumption of any redshift-to-distance relation under a given fiducial cosmology. We present the first cosmological constraints derived from ARF by using BOSS LOWZ+CMASS DR12 galaxy samples, obtaining 7\%-accurate constraints on $H/H_{0}f{\sigma }_8(z)$ at more than 20 redshifts over the range $z\in [0.26,0.72]$. Our best-fitting value is $10\%$ larger, but compatible at the $1.4\sigma$ level, than the $\Lambda$CDM expectation set by {\it Planck} observations of the Cosmic Microwave Background (CMB) radiation. Our tomographic measurements, combined with these CMB data, provides one of the strongest constraints on the gravity index $\gamma$, $\gamma =0.44_{-0.07}^{+0.09}$, which lies within $2\sigma$ from the prediction of General Relativity (${\gamma }_{\mathrm{GR}}\simeq 0.55$).

arXiv comment5 pages, 3 figures, matches accepted version in MNRAS letters

References in corpus (30)

• Planck 2015 results. XIII. Cosmological parameters
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological analysis of the DR12 galaxy sample
• The Eleventh and Twelfth Data Releases of the Sloan Digital Sky Survey: Final Data from SDSS-III
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Galaxy Clustering and Weak Lensing
• MASTER of the CMB Anisotropy Power Spectrum: A Fast Method for Statistical Analysis of Large and Complex CMB Data Sets
• Dark Energy Survey Year 1 Results: Cosmological Constraints from Cosmic Shear
• The 6dF Galaxy Survey: z \approx 0 measurement of the growth rate and sigma_8
• The WiggleZ Dark Energy Survey: the growth rate of cosmic structure since redshift z=0.9
• 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: RSD measurement from the power spectrum and bispectrum of the DR12 BOSS galaxies
• Solving Large Scale Structure in Ten Easy Steps with COLA
• 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: Analysis of potential systematics
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in Fourier-space
• The Atacama Cosmology Telescope: The polarization-sensitive ACTPol instrument
• The 2dF Galaxy Redshift Survey: Spherical Harmonics analysis of fluctuations in the final catalogue
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: cosmological implications of the configuration-space clustering wedges
• Ameliorating Systematic Uncertainties in the Angular Clustering of Galaxies: A Study using SDSS-III
• Cosmology with the SPHEREX All-Sky Spectral Survey
• Methods for Rapidly Processing Angular Masks of Next-Generation Galaxy Surveys
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the correlation function of LOWZ and CMASS galaxies in Data Release 12
• Clustering of quasars in SDSS-IV eBOSS : study of potential systematics and bias determination
• Cosmological Measurements from Angular Power Spectra Analysis of BOSS DR12 Tomography
• The Clustering of Galaxies in the Completed SDSS-III Baryon Oscillation Spectroscopic Survey: single-probe measurements from DR12 galaxy clustering -- towards an accurate model
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: constraining modified gravity
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: a tomographic analysis of structure growth and expansion rate from anisotropic galaxy clustering
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Angular clustering tomography and its cosmological implications
• Euclid space mission: a cosmological challenge for the next 15 years
• Multiplicative errors in the galaxy power spectrum: self-calibration of unknown photometric systematics for precision cosmology
• The Simons Observatory: Project Overview

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• Baryon Acoustic Oscillations in tomographic Angular Density and Redshift Fluctuations
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