The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the growth rate of structure from the small-scale clustering of the luminous red galaxy sample
Creators
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1.
University of Waterloo
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2.
California Institute of Technology
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3.
Perimeter Institute
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4.
New York University
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5.
University of Portsmouth
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6.
Center for Particle Physics of Marseilles
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7.
University of Utah
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8.
Institut de Recherche sur les Lois Fondamentales de l'Univers
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9.
University of Barcelona
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Institut d'Estudis Espacials de Catalunya
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National Autonomous University of Mexico
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The Ohio State University
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13.
Sejong University
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Pennsylvania State University
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15.
National Astronomical Observatories
Abstract
We measure the small-scale clustering of the Data Release 16 extended Baryon Oscillation Spectroscopic Survey Luminous Red Galaxy sample, corrected for fibre-collisions using Pairwise Inverse Probability weights, which give unbiased clustering measurements on all scales. We fit to the monopole and quadrupole moments and to the projected correlation function over the separation range 7-60 h⁻¹Mpc with a model based on the aemulus cosmological emulator to measure the growth rate of cosmic structure, parametrized by fσ8. We obtain a measurement of fσ8(z = 0.737) = 0.408 ± 0.038, which is 1.4σ lower than the value expected from 2018 Planck data for a flat ΛCDM model, and is more consistent with recent weak-lensing measurements. The level of precision achieved is 1.7 times better than more standard measurements made using only the large-scale modes of the same sample. We also fit to the data using the full range of scales 0.1-60h⁻¹Mpc modelled by the aemulus cosmological emulator and find a 4.5σ tension in the amplitude of the halo velocity field with the Planck + ΛCDM model, driven by a mismatch on the non-linear scales. This may not be cosmological in origin, and could be due to a breakdown in the Halo Occupation Distribution model used in the emulator. Finally, we perform a robust analysis of possible sources of systematics, including the effects of redshift uncertainty and incompleteness due to target selection that were not included in previous analyses fitting to clustering measurements on small scales.
Copyright and License
© 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society
Acknowledgement
ZZ is supported in part by NASA grant 15-WFIRST15-0008, Cosmology with the High Latitude Survey Roman Science Investigation Team (SIT). JLT acknowledges the support of NSF AAG grant 2009291. MJC, FGM, ZZ, and WJP acknowledge financial support from the Canadian Space Agency (CSA) and the Natural Sciences and Engineering Research Council of Canada (NSERC). GR acknowledges support from the National Research Foundation of Korea (NRF) through Grants Nos 2017R1E1A1A01077508 and 2020R1A2C1005655 funded by the Korean Ministry of Education, Science and Technology (MoEST).
Research at Perimeter Institute is supported, in part, by the Government of Canada through the Department of Innovation, Science and Economic Development Canada and by the Province of Ontario through the Ministry of Colleges and Universities.
This research was enabled, in part, by the support provided by Compute Ontario (www.computeontario.ca) and Compute Canada (www.computecanada.ca).
Funding for the Sloan Digital Sky Survey IV has been provided by the Alfred P. Sloan Foundation, the U.S. Department of Energy Office of Science, and the Participating Institutions. SDSS-IV acknowledges support and resources from the Center for High Performance Computing at the University of Utah. The SDSS website is www.sdss.org. SDSS-IV is managed by the Astrophysical Research Consortium for the Participating Institutions of the SDSS Collaboration including the Brazilian Participation Group, the Carnegie Institution for Science, Carnegie Mellon University, Center for Astrophysics | Harvard & Smithsonian, the Chilean Participation Group, the French Participation Group, Instituto de Astrofísica de Canarias, The Johns Hopkins University, Kavli Institute for the Physics and Mathematics of the Universe (IPMU) / University of Tokyo, the Korean Participation Group, Lawrence Berkeley National Laboratory, Leibniz Institut für Astrophysik Potsdam (AIP), Max-Planck-Institut für Astronomie (MPIA Heidelberg), Max-Planck-Institut für Astrophysik (MPA Garching), Max-Planck-Institut für Extraterrestrische Physik (MPE), National Astronomical Observatories of China, New Mexico State University, New York University, University of Notre Dame, Observatário Nacional / MCTI, The Ohio State University, Pennsylvania State University, Shanghai Astronomical Observatory, United Kingdom Participation Group, Universidad Nacional Autónoma de México, University of Arizona, University of Colorado Boulder, University of Oxford, University of Portsmouth, University of Utah, University of Virginia, University of Washington, University of Wisconsin, Vanderbilt University, and Yale University.
Data Availability
The eBOSS galaxy and random catalogues are publicly available at: https://data.sdss.org/sas/dr16/eboss/lss/catalogs/DR16/ with a description here: https://www.sdss.org/dr16/spectro/lss/ We used the aemulus emulator, which is available here: https://aemulusproject.github.io, and the cobaya package, which is available here: https://github.com/CobayaSampler.
Files
stac1923.pdf
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Additional details
Funding
- National Aeronautics and Space Administration
- 15-WFIRST15-0008
- Shanghai Institute of Technology
- National Science Foundation
- American Association of Geographers
- 2009291
- Canadian Space Agency
- Natural Sciences and Engineering Research Council
- National Research Foundation of Korea
- 2017R1E1A1A01077508
- National Research Foundation of Korea
- 2020R1A2C1005655
- Ministry of Education
- Government of Canada
- Innovation, Science and Economic Development Canada
- Alfred P. Sloan Foundation
- United States Department of Energy
- Office of Science
- University of Utah
- Carnegie Mellon University
- Johns Hopkins University
- The University of Tokyo
- Lawrence Berkeley National Laboratory
- Leibniz Institute for Astrophysics Potsdam
- New Mexico State University
- New York University
- University of Notre Dame
- Ministry of Science, Technology and Innovation
- The Ohio State University
- Pennsylvania State University
- Universidad Nacional Autónoma de México
- University of Arizona
- University of Colorado Boulder
- University of Oxford
- University of Portsmouth
- University of Virginia
- University of Washington
- Vanderbilt University
- Yale University
Dates
- Available
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2022-07-25Published online