The clustering of the SDSS-IV extended Baryon Oscillation Spectroscopic Survey DR14 quasar sample: a tomographic measurement of cosmic structure growth and expansion rate based on optimal redshift…

By Gong-Bo Zhao, Yuting Wang, S. Saito, H. Gil-Marín, Will J. Percival, Dandan Wang, C. Chuang, R. Ruggeri, E. Mueller, Fangzhou Zhu and 21 more. Monthly notices of the Royal Astronomical Society, 2018

206 citations recorded by the source corpus.

We develop a new method, which is based on the optimal redshift weighting scheme, to extract the maximal tomographic information of baryonic acoustic oscillations (BAO) and redshift space distortions (RSD) from the extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 14 quasar (DR14Q) survey. We validate our method using the Extended Zel’dovich mocks, and apply our pipeline to the eBOSS DR14Q sample in the redshift range of 0.8 < |$z$| < 2.2. We report a joint measurement of fσ_8 and two-dimensional BAO parameters D_A and H at four effective redshifts of |$z$|_eff = 0.98, 1.23, 1.52, and 1.94, and provide the full data covariance matrix. Using our measurement combined with BOSS DR12, Main Galaxy Sample (MGS), and 6 degree Field Galaxy Survey (6dFGS) BAO measurements, we find that the existence of dark energy is supported by observations at a 7.4σ significance level. Combining our measurement with BOSS DR12 and Planck observations, we constrain the gravitational growth index to be γ = 0.580 ± 0.082, which is fully consistent with the prediction of general relativity. This paper is part of a set that analyses the eBOSS DR14 quasar sample.

Subfields: Astronomy and Astrophysics, Statistical and Nonlinear Physics

View Paper: https://www.semanticscholar.org/paper/6dea998958053addf3a1e840f4e0d7b565089be3

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Citations in the corpus

A Simple Phenomenological Emergent Dark Energy Model can Resolve the Hubble Tension (2019, methodology): “(ii) BAOs: four lower redshift BAO data sets are used: 6-degree Field Galaxy Survey (6dFGS) (Beutler et al. 2011), the SDSS Data Release 7 Main Galaxy sample (MGS) (Ross et al. 2015), the BOSS DR12 galaxies (Alam et al. 2017a) and the eBOSS DR14 quasars (Zhao et al. 2018).”
Evolution of the f σ 8 tension with the Planck 15 / Λ CDM determination and implications for modified gravity theories (2018, unknown): “176 [107] 9 January 2018 (Ω0m, σ8) = (0.”
Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14 (2019, background): “Note that eBOSS also targets quasars at low redshifts (where the Lyα region is not observable) to be used in other programs (Ata et al. 2018; Wang et al. 2018; Blomqvist et al. 2018; Zhao et al. 2019; du Mas des Bourboux et al. 2019).”