The clustering of the SDSSIV extended Baryon Oscillation Spectroscopic Survey DR14 LRG sample: structure growth rate measurement from the anisotropic LRG correlation function in the redshift range 0.6 < z < 1.0
Abstract
We analyse the anisotropic clustering of the Sloan Digital Sky SurveyIV Extended Baryon Oscillation Spectroscopic Survey (eBOSS) Luminous Red Galaxy Data Release 14 (DR14) sample combined with Baryon Oscillation Spectroscopic Survey (BOSS) CMASS sample of galaxies in the redshift range 0.6 < z < 1.0, which consists of 80 118 galaxies from eBOSS and 46 439 galaxies from the BOSSCMASS sample. The eBOSSCMASS Luminous Red Galaxy sample has a sky coverage of 1844 deg^{2}, with an effective volume of 0.9 Gpc^{3}. The analysis was made in configuration space using a Legendre multipole expansion. The Redshift Space Distortion signal is modelled as a combination of the Convolution Lagrangian Perturbation Model and the Gaussian Streaming Model. We constrain the logarithmic growth of structure times the amplitude of dark matter density fluctuations, f(z_{eff})σ_{8}(z_{eff}) = 0.454 ± 0.134, and the AlcockPaczynski dilation scales which constraints the angular diameter distance D_A(z_{ eff})=1466.5 ± 133.2 (r_s/r_s^fid) and H(z_eff)=105.8 ± 15.7 (r_s^fid/r_s) km s^{1 Mpc^{1}}, where r_{s} is the sound horizon at the end of the baryon drag epoch and r_s^fid is its value in the fiducial cosmology at an effective redshift z_{eff} = 0.72. These results are in full agreement with the current ΛCold Dark Matter (ΛCDM) cosmological model inferred from Planck measurements. This study is the first eBOSS LRG fullshape analysis I.e. including Redshift Space Distortions simultaneously with the AlcockPaczynski effect and the Baryon Acoustic Oscillation scale.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 March 2020
 DOI:
 10.1093/mnras/stz3602
 arXiv:
 arXiv:1909.07742
 Bibcode:
 2020MNRAS.492.4189I
 Keywords:

 surveys;
 dark energy;
 largescale structure of Universe;
 Astrophysics  Cosmology and Nongalactic Astrophysics
 EPrint:
 Accepted on the 5th December 2019, 28 pages,27 figures