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

Journal Article · Sat Sep 12 00:00:00 EDT 2020 · Monthly Notices of the Royal Astronomical Society

DOI:https://doi.org/10.1093/mnras/staa2780· OSTI ID:1670815

Neveux, Richard ^[1]; Burtin, Etienne ^[1]; de Mattia, Arnaud ^[1]; Smith, Alex ^[1]; Ross, Ashley J. ^[2]; Hou, Jiamin ^[3]; Bautista, Julian ^[4]; Brinkmann, Jonathan ^[5]; Chuang, Chia-Hsun ^[6]; Dawson, Kyle S. ^[7]; Gil-Marín, Héctor ^[8]; W. Lyke, Brad ^[9]; de la Macorra, Axel ^[10]; du Mas des Bourboux, Hélion ^[7]; Mohammad, Faizan G. ^[11]; Müller, Eva-Maria ^[12]; Myers, Adam D. ^[9]; Newman, Jeffrey A. ^[13]; Percival, Will J. ^[14]; Rossi, Graziano ^[15] ; Schneider, Donald ^[16]; Vivek, M. ^[17]; Zarrouk, Pauline ^[18]; Zhao, Cheng ^[19]; Zhao, Gong-Bo ^[20]

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1. IRFU,CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France
2. Center for Cosmology and Astroparticle Physics, The Ohio State University, Columbus, OH 43210, USA
3. Max-Planck-Institut für Extraterrestrische Physik, Postfach 1312, Giessenbachstr., D-85748 Garching bei München, Germany
4. Institute of Cosmology & Gravitation, Dennis Sciama Building, University of Portsmouth, Portsmouth PO1 3FX, UK
5. Apache Point Observatory, P.O. Box 59, Sunspot, NM 88349, USA
6. Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, CA 94305, USA
7. Department Physics and Astronomy, University of Utah, 115 S 1400 E, Salt Lake City, UT 84112, USA
8. Institut de Ciències del Cosmos, Universitat de Barcelona, ICCUB, Mart’i i Franquès 1, E-08028 Barcelona, Spain, Institut d’Estudis Espacials de Catalunya (IEEC), E-08034 Barcelona, Spain
9. University of Wyoming, 1000 E. University Ave., Laramie, WY 82071, USA
10. Instituto de Física, Universidad Nacional Autónoma de México, Apdo. Postal 20-364, México
11. Waterloo Centre for Astrophysics, University of Waterloo, Waterloo, ON N2L 3G1, Canada, Department of Physics and Astronomy, University of Waterloo, Waterloo, ON N2L 3G1, Canada
12. Sub-department of Astrophysics, Department of Physics, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK
13. PITT PACC, Department of Physics and Astronomy, University of Pittsburgh, Pittsburgh, PA 15260, USA
14. Waterloo Centre for Astrophysics, University of Waterloo, Waterloo, ON N2L 3G1, Canada, Department of Physics and Astronomy, University of Waterloo, Waterloo, ON N2L 3G1, Canada, Perimeter Institute for Theoretical Physics, 31 Caroline St. North, Waterloo, ON N2L 2Y5, Canada
15. Department of Physics and Astronomy, Sejong University, Seoul 143-747, Korea
16. Institute for Gravitation and the Cosmos, Pennsylvania State University, University Park, PA 16802, USA
17. Department of Astronomy & Astrophysics, Pennsylvania State University, University Park, PA 16802, USA, Indian Institute of Astrophysics, Koramangala, Bangalore 560034, India
18. IRFU,CEA, Université Paris-Saclay, F-91191 Gif-sur-Yvette, France, Institute for Computational Cosmology, Department of Physics, University of Durham, South Road, Durham DH1 3LE, UK
19. Institute of Physics, Laboratory of Astrophysics, École Polytechnique Fédérale de Lausanne (EPFL), Observatoire de Sauverny, CH-1290 Versoix, Switzerland
20. National Astronomy Observatories, Chinese Academy of Science, Beijing, 100012, P.R. China

ABSTRACT

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.

• Sponsoring Organization: USDOE
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1670815
• Journal Information: Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Journal Issue: 1 Vol. 499; ISSN 0035-8711
• Publisher: Oxford University Press
• Country of Publication: United Kingdom
• Language: English