학술논문
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
Document Type
Working Paper
Author
Bautista, Julian E.; Paviot, Romain; Magaña, Mariana Vargas; de la Torre, Sylvain; Fromenteau, Sebastien; Gil-Marín, Hector; Ross, Ashley J.; Burtin, Etienne; Dawson, Kyle S.; Hou, Jiamin; Kneib, Jean-Paul; de Mattia, Arnaud; Percival, Will J.; Rossi, Graziano; Tojeiro, Rita; Zhao, Cheng; Zhao, Gong-Bo; Alam, Shadab; Brownstein, Joel; Chapman, Michael J.; Choi, Peter D.; Chuang, Chia-Hsun; Escoffier, Stéphanie; de la Macorra, Axel; Bourboux, Hélion du Mas des; Mohammad, Faizan G.; Moon, Jeongin; Müller, Eva-Maria; Nadathur, Seshadri; Newman, Jeffrey A.; Schneider, Donald; Seo, Hee-Jong; Wang, Yuting
Source
Subject
Language
Abstract
We present the cosmological analysis of the configuration-space anisotropic clustering in the completed Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic Survey (eBOSS) DR16 galaxy sample. This sample consists of luminous red galaxies (LRGs) spanning the redshift range $0.6 < z < 1$, at an effective redshift of $z_{\rm eff}=0.698$. It combines 174 816 eBOSS LRGs and 202 642 BOSS CMASS galaxies. We extract and model the baryon acoustic oscillations (BAO) and redshift-space distortions (RSD) features from the galaxy two-point correlation function to infer geometrical and dynamical cosmological constraints. The adopted methodology is extensively tested on a set of realistic simulations. The correlations between the inferred parameters from the BAO and full-shape correlation function analyses are estimated. This allows us to derive joint constraints on the three cosmological parameter combinations: $D_M(z)/r_d$, $D_H(z)/r_d$ and $f\sigma_8(z)$, where $D_M$ is the comoving angular diameter distance, $D_H$ is Hubble distance, $r_d$ is the comoving BAO scale, $f$ is the linear growth rate of structure, and $\sigma_8$ is the amplitude of linear matter perturbations. After combining the results with those from the parallel power spectrum analysis of Gil-Marin et al. 2020, we obtain the constraints: $D_M/r_d = 17.65 \pm 0.30$, $D_H/r_d = 19.77 \pm 0.47$, $f\sigma_8 = 0.473 \pm 0.044$. These measurements are consistent with a flat $\Lambda$CDM model with standard gravity.
Comment: 29 pages, 21 figures. Matches accepted version after minor modifications. A summary of all SDSS BAO and RSD measurements with accompanying legacy figures can be found here: https://www.sdss.org/science/final-bao-and-rsd-measurements The full cosmological interpretation of these measurements can be found here: https://www.sdss.org/science/cosmology-results-from-eboss/
Comment: 29 pages, 21 figures. Matches accepted version after minor modifications. A summary of all SDSS BAO and RSD measurements with accompanying legacy figures can be found here: https://www.sdss.org/science/final-bao-and-rsd-measurements The full cosmological interpretation of these measurements can be found here: https://www.sdss.org/science/cosmology-results-from-eboss/