Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 482, Issue 3, Pages 3497-3513Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sty2845
Keywords
cosmological parameters; dark energy; distance scale; large-scale structure of Universe
Categories
Funding
- European Research Council (ERC) under the European Union [646702]
- NSFC [11720101004, 11673025, 11711530207]
- National Key Basic Research and Development Programe of China [2018YFA0404503]
- Royal Society Newton Advanced Fellowship
- Nebula Talents Program - National Astronomical Observatories, Chinese Academy of Sciences
- Young Researcher Grant - National Astronomical Observatories, Chinese Academy of Sciences
- National Research Foundation of Korea (NRF) - Korean Ministry of Education, Science and Technology (MoEST) [2017077508]
- Sejong University
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy Office of Science
- University of Arizona
- Brazilian Participation Group
- Brookhaven National Laboratory
- Carnegie Mellon University
- University of Florida
- French Participation Group
- German Participation Group
- Harvard University
- Instituto de Astrofisica de Canarias
- Michigan State/Notre Dame/JINA Participation Group
- Johns Hopkins University
- Lawrence Berkeley National Laboratory
- Max Planck Institute for Astrophysics
- Max Planck Institute for Extraterrestrial Physics
- New Mexico State University
- New York University
- Ohio State University
- Pennsylvania State University
- University of Portsmouth
- Princeton University
- Spanish Participation Group
- University of Tokyo
- University of Utah
- Vanderbilt University
- University of Virginia
- University of Washington
- Yale University
- Colorado University, Boulder
- Harvard-Smithsonian Center for Astrophysics Participation Group
- Kavli Institute for the Physics and Mathematics of the Universe Max-Planck-Institut fuer Astrophysik (MPA Garching)
- Max-Planck-Institut fuer Extraterrestrische Physik (MPE)
- Max-Planck-Institut fuer Astronomie (MPIA Heidelberg)
- National Astronomical Observatories of China
- Penn State University
- Shanghai Astronomical Observatory
- United Kingdom Participation Group
- University of Wisconsin
- ICG
- SEP-Net
- Office of Science of the U.S. Department of Energy [DE-AC02-05CH11231]
- STFC [ST/N000668/1, ST/M002853/1] Funding Source: UKRI
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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 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 f sigma(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 7.4 sigma significance level. Combining our measurement with BOSS DR12 and Planck observations, we constrain the gravitational growth index to be gamma = 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.
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