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Title: Baryon acoustic oscillations at z = 2.34 from the correlations of Ly α absorption in eBOSS DR14

Journal Article · · Astronomy and Astrophysics
 [1];  [1];  [2];  [1];  [3];  [4];  [5];  [6];  [3];  [7];  [2];  [5];  [8];  [5];  [9];  [3];  [10];  [11];  [5]
  1. Sorbonne Univ., Paris (France)
  2. Univ. of Utah, Salt Lake City, UT (United States)
  3. Aix-Marseille Univ., and CNRS/IN2P3, Marseille (France)
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  5. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  6. Univ. College London (UCL), London (United Kingdom)
  7. Univ. of Portsmouth (United Kingdom)
  8. Univ. Nacional Autonoma de Mexico (UNAM), Mexico City (Mexico). Inst. de Astronomia
  9. Univ. of Waterloo, ON (Canada)
  10. Pennsylvania State Univ., University Park, PA (United States)
  11. Brookhaven National Lab. (BNL), Upton, NY (United States)

We measure the imprint of primordial baryon acoustic oscillations (BAOs) in the correlation function of Lyαabsorption in quasar spectra from the Baryon Oscillation Spectroscopic Survey (BOSS) and the extended BOSS (eBOSS) in Data Release 14 (DR14) of the Sloan Digital Sky Survey (SDSS)-IV. In addition to 179 965 spectra with absorption in the Lyman-α(Lyα) region, we use Lyαabsorption in the Lyman-βregion of 56 154 spectra for the first time. We measure the Hubble distance,DH, and the comoving angular diameter distance,DM, relative to the sound horizon at the drag epochrdat an effective redshiftz = 2.34. Using a physical model of the correlation function outside the BAO peak, we findDH(2.34)/rd = 8.86 ± 0.29 andDM(2.34)/rd = 37.41 ± 1.86, within 1σfrom the flat-ΛCDM model consistent with CMB anisotropy measurements. With the addition of polynomial “broadband” terms, the results remain within one standard deviation of the CMB-inspired model. Combined with the quasar-Lyαcross-correlation measurement presented in a companion paper, the BAO measurements atz = 2.35 are within 1.7σof the predictions of this model.

Research Organization:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP)
Grant/Contract Number:
SC0012704
OSTI ID:
1570659
Report Number(s):
BNL-212173-2019-JAAM; TRN: US2001115
Journal Information:
Astronomy and Astrophysics, Vol. 629; ISSN 0004-6361
Publisher:
EDP SciencesCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 131 works
Citation information provided by
Web of Science

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The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples text January 2013
Planck 2015 results. XIII. Cosmological parameters text January 2015
The SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Overview and Early Data text January 2015
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Correlations in the three-dimensional Lyman-alpha forest contaminated by high column density absorbers text January 2017
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Cited By (6)

Baryon acoustic oscillations from the cross-correlation of Ly α absorption and quasars in eBOSS DR14 journal September 2019
The BAO+BBN take on the Hubble tension journal October 2019
Beyond two-point statistics: using the minimum spanning tree as a tool for cosmology journal November 2019
Cosmic Expansion History from Line-Intensity Mapping journal December 2019
The Cosmic Expansion History from Line-Intensity Mapping text January 2019
Polarizations of CMB and the Hubble tension preprint January 2020

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