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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 weights

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arxiv 1801.03043 v3 pith:MGQW7JKF submitted 2018-01-09 astro-ph.CO

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 weights

Gong-Bo Zhao , Yuting Wang , Shun Saito , H\'ector Gil-Mar\'in , Will J. Percival , Dandan Wang , Chia-Hsun Chuang , Rossana Ruggeri
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Eva-Maria Mueller Fangzhou Zhu Ashley J. Ross Rita Tojeiro Isabelle P\^aris Adam D. Myers Jeremy L. Tinker Jian Li Etienne Burtin Pauline Zarrouk Florian Beutler Falk Baumgarten Julian E. Bautista Joel R. Brownstein Kyle S. Dawson Jiamin Hou Axel de la Macorra Graziano Rossi John A. Peacock Ariel G. S\'anchez Arman Shafieloo Donald P. Schneider Cheng Zhao
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keywords measurementredshiftebossquasarsamplesurveybaryonboss
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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 EZ 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 $f\sigma_8$ and two-dimensional BAO parameters $D_{\rm A}$ and $H$ at four effective redshifts of $z_{\rm eff}=0.98, 1.23, 1.52$ and $1.94$, and provide the full data covariance matrix. Using our measurement combined with BOSS DR12, MGS and 6dFGS BAO measurements, we find that the existence of dark energy is supported by observations at a $7.4\sigma$ significance level. Combining our measurement with BOSS DR12 and Planck observations, we constrain the gravitational growth index to be $\gamma=0.580\pm0.082$, which is fully consistent with the prediction of general relativity. This paper is part of a set that analyses the eBOSS DR14 quasar sample.

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Cited by 4 Pith papers

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    Optimal redshift weighting on eBOSS QSO full-shape data reduces uncertainties on H0 by 43.3%, σ8 by 19.7%, w0 by 20.5% and produces a bounded posterior on wa in the CPL model.

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    The f(Q, L_m) gravity model fits observational data from BBN to late-time acceleration, acting as a viable quintessence-like alternative to the standard LambdaCDM model.

  3. Exploring Cosmic Evolution in R\'enyi Entropic Cosmology with Constraints from DESI DR2 BAO and GW Data

    gr-qc 2026-04 unverdicted novelty 5.0

    Rényi entropic corrections to cosmology are constrained by DESI DR2 BAO and GW data to a viable quintessence-like model that approaches ΛCDM without phantom behavior and satisfies BBN bounds.

  4. Cosmological Constraints on Minimal Cubic Galileon Models in Teleparallel Gravity

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    Observational constraints on teleparallel cubic Galileon cosmologies with quadratic and exponential potentials show viability for late-time acceleration, with the fixed b1 quadratic case competitive under AIC but not BIC.