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Title: Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14

Journal Article · · Astronomy and Astrophysics
 [1];  [2];  [3];  [3];  [4];  [3];  [5];  [2];  [6];  [7];  [4];  [4];  [8];  [1];  [1];  [9];  [10];  [4]
  1. Aix-Marseille Univ., and CNRS, Marseille (France)
  2. Univ. of Utah, Salt Lake City, UT (United States)
  3. Sorbonne Univ., Paris (France). Lab. de Physique Nucléaire et de Hautes Energies (LPNHE)
  4. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  5. Univ. of Portsmouth (United Kingdom)
  6. Univ. College London, London (United Kingdom)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. Univ. of Waterloo, ON (Canada)
  9. Pennsylvania State Univ., University Park, PA (United States)
  10. Brookhaven National Lab. (BNL), Upton, NY (United States)
+ Show Author Affiliations

We present a measurement of the baryon acoustic oscillation (BAO) scale at redshift z=2.35 from the three-dimensional correlation of Lyman-α (Lyα) forest absorption and quasars. The study uses 266 590 quasars in the redshift range 1.77< z < 3.5 from the Sloan Digital Sky Survey (SDSS) Data Release 14 (DR14). The sample includes the first two years of observations by the SDSS-IV extended Baryon Oscillation Spectroscopic Survey (eBOSS), providing new quasars and re-observations of BOSS quasars for improved statistical precision. Statistics are further improved by including Lyα absorption occurring in the Lyβ wavelength band of the spectra. From the measured BAO peak position along and across the line of sight, we determined the Hubble distance DH and the comoving angular diameter distance DM relative to the sound horizon at the drag epoch rd:DH(z=2.35)/rd=9.20 ± 0.36 and DM(z=2.35)/rd=36.3±1.8. These results are consistent at 1.5σ with the prediction of the best-fit spatially-flat cosmological model with the cosmological constant reported for the Planck (2016) analysis of cosmic microwave background anisotropies. Combined with the Lyα auto-correlation measurement presented in a companion paper, the BAO measurements at z=2.34 are within 1.7σ of 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:
1569538
Report Number(s):
BNL-212171-2019-JAAM; TRN: US2001116
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: 150 works
Citation information provided by
Web of Science

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Cited By (6)

Brans–Dicke Gravity with a Cosmological Constant Smoothes Out ΛCDM Tensions journal November 2019
The BAO+BBN take on the Hubble tension journal October 2019
Baryon acoustic oscillations at z = 2.34 from the correlations of Ly α absorption in eBOSS DR14 journal September 2019
Cosmic Expansion History from Line-Intensity Mapping journal December 2019
The Cosmic Expansion History from Line-Intensity Mapping text January 2019
The most luminous blue quasars at 3.0 < z < 3.3: I. A tale of two X-ray populations journal December 2019

Figures / Tables (22)

Fig. 1(p. 5)figure Fig. 1
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Table 5(p. 13)table Table 5
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Table A.1(p. 18)table Table A.1
Table B.1(p. 18)table Table B.1
Fig. A.1(p. 19)figure Fig. A.1
Fig. B.1(p. 20)figure Fig. B.1

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