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The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: measuring the evolution of the growth rate using redshift-space distortions between redshift 0.8 and 2.2

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Author(s)

Rossana Ruggeri, Will J. Percival, Hector Gil Marin, Florian Beutler, Eva Maria Mueller, Fangzhou Zhu, Nikhil Padmanabhan, Gong-Bo Zhao, Pauline Zarrouk, Ariel G. Sanchez, Julian Bautista, Jonathan Brinkmann, Joel R. Brownstein, Falk Baumgarten, Chia Hsun Chuang, Kyle Dawson, Hee-Jong Seo, Rita Tojeiro, Cheng Zhao

School/Research organisations

Abstract

We measure the growth rate and its evolution using the anisotropic clustering of the extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 14 (DR14) quasar sample, which includes 148 659 quasars covering the wide redshift range of 0.8 < z < 2.2 and a sky area of 2112.90 deg2. To optimize measurements we deploy a redshift-dependent weighting scheme, which allows us to avoid binning and perform the data analysis consistently including the redshift evolution across the sample. We perform the analysis in Fourier space, and use the redshift evolving power spectrum multipoles to measure the redshift-space distortion parameter fσ8 and parameters controlling the anisotropic projection of the cosmological perturbations. We measure fσ8(z = 1.52) = 0.43 ± 0.05 and dfσ8/dz(z = 1.52) = -0.16 ± 0.08, consistent with the expectation for a lambda cold dark matter cosmology as constrained by the Planck experiment.
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Original languageEnglish
Pages (from-to)3878–3887
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume483
Issue number3
Early online date20 Dec 2018
DOIs
Publication statusPublished - Mar 2019

    Research areas

  • Cosmology: observations, Dark energy, Dark matter, Large scale structure of the Universe

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