Model-agnostic interpretation of 10 billion years of cosmic evolution traced by BOSS and eBOSS data

Abstract

We present the first model-agnostic analysis of the complete set of Sloan Digital Sky Survey III (BOSS) and -IV (eBOSS) catalogues of luminous red galaxy and quasar clustering in the redshift range $0.2\le z\le 2.2$ (10 billion years of cosmic evolution), which consistently includes the baryon acoustic oscillations (BAO), redshift space distortions (RSD) and the shape of the transfer function signatures, from pre- and post-reconstructed catalogues in Fourier space. This approach complements the standard analyses techniques which only focus on the BAO and RSD signatures, and the full-modeling approaches which assume a specific underlying cosmology model to perform the analysis. These model-independent results can then easily be interpreted in the context of the cosmological model of choice. In particular, when combined with $z>2.1$ Ly-$\alpha$ BAO measurements, the clustering BAO, RSD and {\it Shape} parameters can be interpreted within a flat-$\Lambda$CDM model yielding $h=0.6816\pm 0.0067$, ${\Omega }_{\mathrm{m}}=0.3001\pm 0.0057$ and $10^9\times A_s=2.43\pm 0.20$ (or ${\sigma }_8=0.858\pm 0.036$) with a Big Bang Nucleosynthesis prior on the baryon density. Without any external dataset, the BOSS and eBOSS data alone imply ${\Omega }_{\mathrm{m}}=0.2971\pm 0.0061$ and $10^9\times A_s=2.39_{-0.43}^{+0.24}$ (or ${\sigma }_8=0.857\pm 0.040$). For models beyond $\Lambda$CDM, eBOSS data alone (in combination with Planck) constrain the sum of neutrino mass to be $\Sigma m_{\nu }<0.40$ eV with a BBN prior ($\Sigma m_{\nu }<0.082$ eV) at 95\% CL, the curvature energy density to ${\Omega }_{\mathrm{k}}=-0.022_{-0.038}^{+0.032}$ (${\Omega }_{\mathrm{k}}=0.0015\pm 0.0016$) and the dark energy equation of state parameter to $w=-0.998_{-0.073}^{+0.085}$ ($w=-1.093_{-0.044}^{+0.048}$) at 68\% CL without a BBN prior.

68 pages, 18 figures, 14 tables, comments welcome, v2 matches accepted version

References in corpus (27)

• The 2.5 m Telescope of the Sloan Digital Sky Survey
• Massive neutrinos and cosmology
• The Effective Field Theory of Cosmological Large Scale Structures
• The Sloan Digital Sky Survey Quasar Catalog: Sixteenth Data Release
• Improving Cosmological Distance Measurements by Reconstruction of the Baryon Acoustic Peak
• Resumming Cosmological Perturbations via the Lagrangian Picture: One-loop Results in Real Space and in Redshift Space
• On the Robustness of the Acoustic Scale in the Low-Redshift Clustering of Matter
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Anisotropic galaxy clustering in Fourier-space
• 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
• Gravity and Large-Scale Non-local Bias
• Testing cosmological structure formation using redshift-space distortions
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in Fourier-space
• Baryon acoustic oscillations from the complete SDSS-III Ly$\alpha$-quasar cross-correlation function at $z=2.4$
• Understanding higher-order nonlocal halo bias at large scales by combining the power spectrum with the bispectrum
• The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Large-scale Structure Catalogs for Cosmological Analysis
• A new analysis of galaxy 2-point functions in the BOSS survey, including full-shape information and post-reconstruction BAO
• The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Cosmological implications of the Fourier space wedges of the final sample
• Non-local Lagrangian bias
• ShapeFit: extracting the power spectrum shape information in galaxy surveys beyond BAO and RSD
• The Effect of Fiber Collisions on the Galaxy Power Spectrum Multipole
• Efficient Reconstruction of Linear Baryon Acoustic Oscillations in Galaxy Surveys
• Extending the modeling of the anisotropic galaxy power spectrum to $k=0.4h{\mathrm{Mpc}}^{-1}$
• Model-independent versus model-dependent interpretation of the SDSS-III BOSS power spectrum: Bridging the divide
• Moving around the cosmological parameter space: a nonlinear power spectrum reconstruction based on high-resolution cosmic responses
• PT challenge: Validation of ShapeFit on large-volume, high-resolution mocks
• Barry and the BAO Model Comparison
• Combined full shape analysis of BOSS galaxies and eBOSS quasars using an iterative emulator