The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from anisotropic clustering analysis of the quasar sample in configuration space between redshift 0.8…

By Jiamin Hou, Ariel G. Sánchez, A. Ross, Alex Smith, R. Neveux, Julián Bautista, É. Burtin, Cheng Zhao, R. Scoccimarro, K. Dawson and 20 more. Monthly notices of the Royal Astronomical Society, 2020

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We measure the anisotropic clustering of the quasar sample from Data Release 16 (DR16) of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS). A sample of 343 708 spectroscopically confirmed quasars between redshift 0.8 < z < 2.2 are used as tracers of the underlying dark matter field. In comparison with DR14 sample, the final sample doubles the number of objects as well as the survey area. In this paper, we present the analysis in configuration space by measuring the two-point correlation function and decomposing it using the Legendre polynomials. For the full-shape analysis of the Legendre multipole moments, we measure the baryon acoustic oscillation (BAO) distance and the growth rate of the cosmic structure. At an effective redshift of zeff = 1.48, we measure the comoving angular diameter distance DM(zeff)/rdrag = 30.66 ± 0.88, the Hubble distance DH(zeff)/rdrag = 13.11 ± 0.52, and the product of the linear growth rate and the rms linear mass fluctuation on scales of $8 \, h^{-1}\, {\rm Mpc}$, fσ8(zeff) = 0.439 ± 0.048. The accuracy of these measurements is confirmed using an extensive set of mock simulations developed for the quasar sample. The uncertainties on the distance and growth rate measurements have been reduced substantially (∼45 and ∼30 per cent) with respect to the DR14 results. We also perform a BAO-only analysis to cross check the robustness of the methodology of the full-shape analysis. Combining our analysis with the Fourier-space analysis, we arrive at $D^{{\bf c}}_{\rm M}(z_{\rm eff})/r_{\rm drag} = 30.21 \pm 0.79$, $D^{{\bf c}}_{\rm H}(z_{\rm eff})/r_{\rm drag} = 13.23 \pm 0.47$, and $f\sigma _8^{{\bf c}}(z_{\rm eff}) = 0.462 \pm 0.045$.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/6b03b018dcf320b5940c5bff56cb450696d0bc11

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Citations in the corpus

The Pantheon+ Analysis: Cosmological Constraints (2022, methodology): “…SDSS Extended Baryon Oscillation Spectroscopic Survey (eBOSS) Luminous Red Galaxy (Bautista et al. 2020), SDSS eBOSS Emission Line Galaxies (Bautista et al. 2020), SDSS eBOSS Quasar (Hou et al. 2020), SDSS eBOSS Lyα (du Mas des Bourboux et al. 2020), all of which have been implemented in CosmoSIS.”
Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory (2020, methodology): “…release of the final eBOSS measurements of BAO and RSD in the clustering of luminous red galaxies (LRG; Bautista et al. 2020; Gil-Marin et al. 2020), emission line galaxies (ELG; Raichoor et al. 2020; Tamone et al. 2020; de Mattia et al. 2020), and quasars (Hou et al. 2020; Neveux et al. 2020).”
The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations with Lyα Forests (2020, background): “6 1.0 (Bautista et al. 2020; Gil-Marín et al. 2020), of emission-line galaxies (ELGs) in the range 0.6<z<1.1 (Raichoor et al. 2020; Tamone et al. 2020; de Mattia et al. 2020), and of quasars in the range 0.8<z<2.2 (Hou et al. 2020; Neveux et al. 2020).”