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 and 2.2

Jiamin Hou, Ariel G. Sánchez, Ashley J. Ross, Alex Smith, Richard Neveux, Julian Bautista, Etienne Burtin, Cheng Zhao, Román Scoccimarro, Kyle S. Dawson, Arnaud De Mattia, Axel De La Macorra, Hélion Du Mas Des Bourboux, Daniel J. Eisenstein, Héctor Gil-Marín, Brad W. Lyke, Faizan G. Mohammad, Eva Maria Mueller, Will J. Percival, Graziano RossiMariana Vargas Magaña, Pauline Zarrouk, Gong Bo Zhao, Jonathan Brinkmann, Joel R. Brownstein, Chia Hsun Chuang, Adam D. Myers, Jeffrey A. Newman, Donald P. Schneider, M. Vivek

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3 Scopus citations

Abstract

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 $8 \, h{-1}\, {\rm Mpc}$, f?8(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 $f\sigma-8{{\bf c}}(z-{\rm eff}) = 0.462 \pm 0.045$.

Original language English (US) 1201-1221 21 Monthly Notices of the Royal Astronomical Society 500 1 https://doi.org/10.1093/mnras/staa3234 Published - Jan 1 2021

All Science Journal Classification (ASJC) codes

• Astronomy and Astrophysics
• Space and Planetary Science