Constraining the relative velocity effect using the Baryon Oscillation Spectroscopic Survey
Abstract
Here, we analyse the power spectrum of the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 to constrain the relative velocity effect, which represents a potential systematic for measurements of the baryon acoustic oscillation (BAO) scale. The relative velocity effect is sourced by the different evolution of baryon and cold dark matter perturbations before decoupling. Our power spectrum model includes all one-loop redshift-space terms corresponding to vbc parametrized by the bias parameter b$$2\atop{v}$$ . We also include the linear terms proportional to the relative density, δbc, and relative velocity dispersion, θbc, which we parametrize with the bias parameters b$$bc\atop{δ}$$ and b$$bc\atop{θ}$$. This data does not support a detection of the relative velocity effect in any of these parameters. Combining the low- and high-redshift bins of BOSS, we find limits of b$$2\atop{v}$$=0.012±0.015(±0.031) , b$$bc\atop{δ}$$=-1.0±2.5(±6.2) and b$$bc\atop{θ}$$=-114±55(±175) with 68 percent (95 percent) confidence levels. These constraints restrict the potential systematic shift in DA(z), H(z) and fσ8, due to the relative velocity, to 1 percent, 0.8 percent and 2 percent, respectively. Given the current uncertainties on the BAO measurements of BOSS, these shifts correspond to 0.53σ, 0.5σ and 0.22σ for DA(z), H(z) and fσ8, respectively.
- Authors:
-
- Univ. of Portsmouth (United Kingdom). Inst. of Cosmology and Gravitation
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Berkeley, CA (United States). Dept. of Physics
- Stanford Univ., CA (United States). Stanford Inst. for Theoretical Physics, Dept. of Physics, Kavli Inst. for Particle Astrophysics and Cosmology
- Publication Date:
- Research Org.:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1389287
- Grant/Contract Number:
- AC02-76SF00515
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Monthly Notices of the Royal Astronomical Society
- Additional Journal Information:
- Journal Volume: 470; Journal Issue: 3; Journal ID: ISSN 0035-8711
- Publisher:
- Royal Astronomical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 77 NANOSCIENCE AND NANOTECHNOLOGY; gravitation; surveys; cosmological parameters; dark energy; large-scale structure of Universe; cosmology: observations
Citation Formats
Beutler, Florian, Seljak, Uroš, and Vlah, Zvonimir. Constraining the relative velocity effect using the Baryon Oscillation Spectroscopic Survey. United States: N. p., 2017.
Web. doi:10.1093/mnras/stx1196.
Beutler, Florian, Seljak, Uroš, & Vlah, Zvonimir. Constraining the relative velocity effect using the Baryon Oscillation Spectroscopic Survey. United States. https://doi.org/10.1093/mnras/stx1196
Beutler, Florian, Seljak, Uroš, and Vlah, Zvonimir. Tue .
"Constraining the relative velocity effect using the Baryon Oscillation Spectroscopic Survey". United States. https://doi.org/10.1093/mnras/stx1196. https://www.osti.gov/servlets/purl/1389287.
@article{osti_1389287,
title = {Constraining the relative velocity effect using the Baryon Oscillation Spectroscopic Survey},
author = {Beutler, Florian and Seljak, Uroš and Vlah, Zvonimir},
abstractNote = {Here, we analyse the power spectrum of the Baryon Oscillation Spectroscopic Survey (BOSS) Data Release 12 to constrain the relative velocity effect, which represents a potential systematic for measurements of the baryon acoustic oscillation (BAO) scale. The relative velocity effect is sourced by the different evolution of baryon and cold dark matter perturbations before decoupling. Our power spectrum model includes all one-loop redshift-space terms corresponding to vbc parametrized by the bias parameter b$2\atop{v}$ . We also include the linear terms proportional to the relative density, δbc, and relative velocity dispersion, θbc, which we parametrize with the bias parameters b$bc\atop{δ}$ and b$bc\atop{θ}$. This data does not support a detection of the relative velocity effect in any of these parameters. Combining the low- and high-redshift bins of BOSS, we find limits of b$2\atop{v}$=0.012±0.015(±0.031) , b$bc\atop{δ}$=-1.0±2.5(±6.2) and b$bc\atop{θ}$=-114±55(±175) with 68 percent (95 percent) confidence levels. These constraints restrict the potential systematic shift in DA(z), H(z) and fσ8, due to the relative velocity, to 1 percent, 0.8 percent and 2 percent, respectively. Given the current uncertainties on the BAO measurements of BOSS, these shifts correspond to 0.53σ, 0.5σ and 0.22σ for DA(z), H(z) and fσ8, respectively.},
doi = {10.1093/mnras/stx1196},
journal = {Monthly Notices of the Royal Astronomical Society},
number = 3,
volume = 470,
place = {United States},
year = {Tue May 16 00:00:00 EDT 2017},
month = {Tue May 16 00:00:00 EDT 2017}
}
Web of Science
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Works referencing / citing this record:
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