Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 474, Issue 2, Pages 2109-2115Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx2723
Keywords
cosmological parameters; cosmology: observations
Categories
Funding
- National Science Foundation Graduate Research Fellowship [DGE-1144152]
- U.S. Department of Energy [DE-SC0013718]
- Center for Cosmology and AstroParticle Physics Fellowship
- Labex ILP part of the Idex SUPER [ANR-10-LABX-63]
- programme Investissements d'avenir [ANR-11-IDEX-0004-02]
- NSF [AST1412966, AST1517593]
- UK Science and Technology Facilities Research Council [ST/M001709/1, ST/N000668/1]
- European Research Council [614030]
- UK Space Agency [ST/N00180X/1]
- National Research Foundation of Korea (NRF) - Korean Ministry of Education, Science and Technology (MoEST) [NRF-SGER 2014055950]
- faculty research fund of Sejong University
- Leibniz Society for the Karl-Schwarzschild fellowship
- 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
- [NASA -EUCLID11-0004]
- UK Space Agency [ST/N00180X/1] Funding Source: researchfish
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We search for a galaxy clustering bias due to a modulation of galaxy number with the baryon-dark matter relative velocity resulting from recombination-era physics. We find no detected signal and place the constraint b(v) < 0.01 on the relative velocity bias for the CMASS galaxies. This bias is an important potential systematic of baryon acoustic oscillation (BAO) method measurements of the cosmic distance scale using the two-point clustering. Our limit on the relative velocity bias indicates a systematic shift of no more than 0.3 per cent rms in the distance scale inferred from the BAO feature in the BOSS two-point clustering, well below the 1 per cent statistical error of this measurement. This constraint is the most stringent currently available and has important implications for the ability of upcoming large-scale structure surveys such as the Dark Energy Spectroscopic Instrument (DESI) to self-protect against the relative velocity as a possible systematic.
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