2018/01/31 by Jiamin Hou, Ariel G. Sánchez, Román Scoccimarro +20 · 1 citation
Physics and Astronomy · #astro-ph.CO
paper · pdf · doi:10.1093/mnras/sty1984
14 Pages, 10 Figures, submitted to MNRAS
arxiv created 2018/07/26 · arxiv updated 2018/07/27
We explore the cosmological implications of anisotropic clustering measurements of the quasar sample from Data Release 14 of the Sloan Digital Sky Survey IV Extended Baryon Oscillation Spectroscopic Survey (eBOSS) in configuration space. The ∼ 147,000 quasar sample observed by eBOSS offers a direct tracer of the density field and bridges the gap of previous BAO measurements between redshift 0.8<z<2.2. By analysing the two-point correlation function characterized by clustering wedges ξ\rm wi(s) and multipoles ξℓ(s), we measure the angular diameter distance, Hubble parameter and cosmic structure growth rate. We define a systematic error budget for our measurements based on the analysis of N-body simulations and mock catalogues. Based on the DR14 large scale structure quasar sample at the effective redshift z\rm eff=1.52, we find the growth rate of cosmic structure fσ8(z\rm eff)=0.396± 0.079, and the geometric parameters D\rm V(z)/r\rm d=26.47± 1.23, and F\rm AP(z)=2.53± 0.22, where the uncertainties include both statistical and systematic errors. These values are in excellent agreement with the best-fitting standard \rm ΛCDM model to the latest cosmic microwave background data from Planck.