The clustering of the SDSS-IV 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

M. Icaza-Lizaola, M. Vargas-Magaña, S. Fromenteau, S. Alam, B. Camacho, H. Gil-Marin, R. Paviot, Ashley Ross, Donald P. Schneider, Jeremy Tinker, Yuting Wang, Cheng Zhao, Abhishek Prakash, G. Rossi, Gong Bo Zao, Irene Cruz-Gonzalez, Axel De La MacOrra

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Abstract

We analyse the anisotropic clustering of the Sloan Digital Sky Survey-IV 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 BOSS-CMASS sample. The eBOSS-CMASS Luminous Red Galaxy sample has a sky coverage of 1844 deg2, with an effective volume of 0.9 Gpc3. 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(zeff)σ8(zeff) = 0.454 ± 0.134, and the Alcock-Paczynski dilation scales which constraints the angular diameter distance DA(zeff ) = 1466.5 ± 133.2(rs/rfid s ) and H(zeff ) = 105.8 ± 15.7(rfid s/rs)km s-1 Mpc-1, where rs is the sound horizon at the end of the baryon drag epoch and rfid s is its value in the fiducial cosmology at an effective redshift zeff = 0.72. These results are in full agreement with the current Λ-Cold Dark Matter (Λ-CDM) cosmological model inferred from Planck measurements. This study is the first eBOSS LRG full-shape analysis i.e. including Redshift Space Distortions simultaneously with the Alcock-Paczynski effect and the Baryon Acoustic Oscillation scale.

Original languageEnglish (US)
Pages (from-to)4189-4215
Number of pages27
JournalMonthly Notices of the Royal Astronomical Society
Issue number3
DOIs
StatePublished - Mar 1 2020

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Icaza-Lizaola, M., Vargas-Magaña, M., Fromenteau, S., Alam, S., Camacho, B., Gil-Marin, H., Paviot, R., Ross, A., Schneider, D. P., Tinker, J., Wang, Y., Zhao, C., Prakash, A., Rossi, G., Zao, G. B., Cruz-Gonzalez, I., & De La MacOrra, A. (2020). The clustering of the SDSS-IV 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. Monthly Notices of the Royal Astronomical Society, (3), 4189-4215. https://doi.org/10.1093/mnras/stz3602