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Title: Dark Energy Survey Year 1 Results: Measurement of the Baryon Acoustic Oscillation scale in the distribution of galaxies to redshift 1

Abstract

We present angular diameter distance measurements obtained by locating the BAO scale in the distribution of galaxies selected from the first year of Dark Energy Survey data. We consider a sample of over 1.3 million galaxies distributed over a footprint of 1318 deg$^2$ with $$0.6 < z_{\rm photo} < 1$$ and a typical redshift uncertainty of $0.03(1+z)$. This sample was selected, as fully described in a companion paper, using a color/magnitude selection that optimizes trade-offs between number density and redshift uncertainty. We investigate the BAO signal in the projected clustering using three conventions, the angular separation, the co-moving transverse separation, and spherical harmonics. Further, we compare results obtained from template based and machine learning photometric redshift determinations. We use 1800 simulations that approximate our sample in order to produce covariance matrices and allow us to validate our distance scale measurement methodology. We measure the angular diameter distance, $$D_A$$, at the effective redshift of our sample divided by the true physical scale of the BAO feature, $$r_{\rm d}$$. We obtain close to a 4 per cent distance measurement of $$D_A(z_{\rm eff}=0.81)/r_{\rm d} = 10.75\pm 0.43 $$. These results are consistent with the flat $$\Lambda$$CDM concordance cosmological model supported by numerous other recent experimental results.

Authors:
;
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States); Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
Contributing Org.:
DES; Dark Energy Survey Collaboration
OSTI Identifier:
1529399
Alternate Identifier(s):
OSTI ID: 1431580; OSTI ID: 1507693; OSTI ID: 1530012
Report Number(s):
FERMILAB-PUB-17-586; arXiv:1712.06209; BNL-211562-2019-JAAM
1643778
Grant/Contract Number:  
AC02-07CH11359; SC0012704; AC02-76SF00515
Resource Type:
Accepted Manuscript
Journal Name:
Mon.Not.Roy.Astron.Soc.
Additional Journal Information:
Journal Volume: 483; Journal Issue: 4
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; angular; scale; astronomy; galaxies; BAO; cosmology: observations, large-scale structure of Universe

Citation Formats

Abbott, T. M.C., and et al. Dark Energy Survey Year 1 Results: Measurement of the Baryon Acoustic Oscillation scale in the distribution of galaxies to redshift 1. United States: N. p., 2019. Web. doi:10.1093/mnras/sty3351.
Abbott, T. M.C., & et al. Dark Energy Survey Year 1 Results: Measurement of the Baryon Acoustic Oscillation scale in the distribution of galaxies to redshift 1. United States. doi:10.1093/mnras/sty3351.
Abbott, T. M.C., and et al. Mon . "Dark Energy Survey Year 1 Results: Measurement of the Baryon Acoustic Oscillation scale in the distribution of galaxies to redshift 1". United States. doi:10.1093/mnras/sty3351. https://www.osti.gov/servlets/purl/1529399.
@article{osti_1529399,
title = {Dark Energy Survey Year 1 Results: Measurement of the Baryon Acoustic Oscillation scale in the distribution of galaxies to redshift 1},
author = {Abbott, T. M.C. and et al.},
abstractNote = {We present angular diameter distance measurements obtained by locating the BAO scale in the distribution of galaxies selected from the first year of Dark Energy Survey data. We consider a sample of over 1.3 million galaxies distributed over a footprint of 1318 deg$^2$ with $0.6 < z_{\rm photo} < 1$ and a typical redshift uncertainty of $0.03(1+z)$. This sample was selected, as fully described in a companion paper, using a color/magnitude selection that optimizes trade-offs between number density and redshift uncertainty. We investigate the BAO signal in the projected clustering using three conventions, the angular separation, the co-moving transverse separation, and spherical harmonics. Further, we compare results obtained from template based and machine learning photometric redshift determinations. We use 1800 simulations that approximate our sample in order to produce covariance matrices and allow us to validate our distance scale measurement methodology. We measure the angular diameter distance, $D_A$, at the effective redshift of our sample divided by the true physical scale of the BAO feature, $r_{\rm d}$. We obtain close to a 4 per cent distance measurement of $D_A(z_{\rm eff}=0.81)/r_{\rm d} = 10.75\pm 0.43 $. These results are consistent with the flat $\Lambda$CDM concordance cosmological model supported by numerous other recent experimental results.},
doi = {10.1093/mnras/sty3351},
journal = {Mon.Not.Roy.Astron.Soc.},
number = 4,
volume = 483,
place = {United States},
year = {2019},
month = {3}
}

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