The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from the anisotropic power spectrum of the quasar sample between redshift 0.8 and 2.2

By R. Neveux, É. Burtin, Arnaud de Mattia, Alex Smith, A. Ross, Jiamin Hou, Julián Bautista, J. Brinkmann, C. Chuang, K. Dawson and 15 more. Monthly notices of the Royal Astronomical Society, 2020

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We measure the clustering of quasars of the final data release (DR16) of eBOSS. The sample contains $343\, 708$ quasars between redshifts 0.8 ≤ z ≤ 2.2 over $4699\, \mathrm{deg}^2$. We calculate the Legendre multipoles (0,2,4) of the anisotropic power spectrum and perform a BAO and a Full-Shape (FS) analysis at the effective redshift zeff = 1.480. The errors include systematic errors that amount to 1/3 of the statistical error. The systematic errors comprise a modelling part studied using a blind N-body mock challenge and observational effects studied with approximate mocks to account for various types of redshift smearing and fibre collisions. For the BAO analysis, we measure the transverse comoving distance DM(zeff)/rdrag = 30.60 ± 0.90 and the Hubble distance DH(zeff)/rdrag = 13.34 ± 0.60. This agrees with the configuration space analysis, and the consensus yields: DM(zeff)/rdrag = 30.69 ± 0.80 and DH(zeff)/rdrag = 13.26 ± 0.55. In the FS analysis, we fit the power spectrum using a model based on Regularised Perturbation Theory, which includes redshift space distortions and the Alcock–Paczynski effect. The results are DM(zeff)/rdrag = 30.68 ± 0.90 and DH(zeff)/rdrag = 13.52 ± 0.51 and we constrain the linear growth rate of structure f(zeff)σ8(zeff) = 0.476 ± 0.047. Our results agree with the configuration space analysis. The consensus analysis of the eBOSS quasar sample yields: DM(zeff)/rdrag = 30.21 ± 0.79, DH(zeff)/rdrag = 3.23 ± 0.47, and f(zeff)σ8(zeff) = 0.462 ± 0.045 and is consistent with a flat ΛCDM cosmological model using Planck results.

Subfields: Astronomy and Astrophysics

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Citations in the corpus

Target Selection and Validation of DESI Quasars (2022, methodology): “This new field of research with quasars was pioneered by eBOSS (Zarrouk et al. 2018; Neveux et al. 2020; Alam et al. 2021; Hou et al. 2021).”
Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory (2020, methodology): “…release of the final eBOSS measurements of BAO and RSD in the clustering of luminous red galaxies (LRG; Bautista et al. 2020; Gil-Marin et al. 2020), emission line galaxies (ELG; Raichoor et al. 2020; Tamone et al. 2020; de Mattia et al. 2020), and quasars (Hou et al. 2020; Neveux et al. 2020).”
The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from anisotropic clustering analysis of the quasar sample in configuration space between redshift 0.8 and 2.2 (2020, methodology): “We have not explicitly performed the tests on the observational systematics for the BAO-only fit, but the results are expected to be very similar to the ones reported in the Fourier-space analysis at subpercent level (Neveux et al. 2020).”
Validation of the Scientific Program for the Dark Energy Spectroscopic Instrument (2023, methodology): “Previous BAO studies (e.g. Hou et al. 2021; Neveux et al. 2020) used quasars as discrete tracers over the redshift range 0 .”
An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment (2022, background): “…Ross et al. 2015; Alam et al. 2017, 2021) or photometric (Seo et al. 2012; DES Collaboration et al. 2019, 2021) catalogs, and at higher redshifts in Lyman-alpha systems (e.g. Busca et al. 2013; Slosar et al. 2013; du Mas des Bourboux et al. 2020) and quasars (Ata et al. 2018; Neveux et al. 2020).”