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

Abstract

We present a measurement of the baryon acoustic oscillation (BAO) scale at redshift z=2.35 from the three-dimensional correlation of Lyman- α (Ly α) 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 Ly α absorption occurring in the Ly β wavelength band of the spectra. From the measured BAO peak position along and across the line of sight, we determined the Hubble distance D H and the comoving angular diameter distance D M relative to the sound horizon at the drag epoch r d: D H( z=2.35)/ r d=9.20 ± 0.36 and D M( z=2.35)/ r d=36.3±1.8. These results are consistent at 1.5 σ 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 Ly α auto-correlation measurement presented in a companion paper, the BAO measurements atmore » z=2.34 are within 1.7 σ of the predictions of this model.« less

Authors:
 [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)
Publication Date:
Research Org.:
Brookhaven National Lab. (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1569538
Report Number(s):
BNL-212171-2019-JAAM
Journal ID: ISSN 0004-6361
Grant/Contract Number:  
SC0012704
Resource Type:
Accepted Manuscript
Journal Name:
Astronomy and Astrophysics
Additional Journal Information:
Journal Volume: 629; Journal ID: ISSN 0004-6361
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS

Citation Formats

Blomqvist, Michael, du Mas des Bourboux, Hélion, Busca, Nicolás G., de Sainte Agathe, Victoria, Rich, James, Balland, Christophe, Bautista, Julian E., Dawson, Kyle, Font-Ribera, Andreu, Guy, Julien, Le Goff, Jean-Marc, Palanque-Delabrouille, Nathalie, Percival, Will J., Pérez-Ràfols, Ignasi, Pieri, Matthew M., Schneider, Donald P., Slosar, Anže, and Yèche, Christophe. Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14. United States: N. p., 2019. Web. doi:10.1051/0004-6361/201935641.
Blomqvist, Michael, du Mas des Bourboux, Hélion, Busca, Nicolás G., de Sainte Agathe, Victoria, Rich, James, Balland, Christophe, Bautista, Julian E., Dawson, Kyle, Font-Ribera, Andreu, Guy, Julien, Le Goff, Jean-Marc, Palanque-Delabrouille, Nathalie, Percival, Will J., Pérez-Ràfols, Ignasi, Pieri, Matthew M., Schneider, Donald P., Slosar, Anže, & Yèche, Christophe. Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14. United States. doi:10.1051/0004-6361/201935641.
Blomqvist, Michael, du Mas des Bourboux, Hélion, Busca, Nicolás G., de Sainte Agathe, Victoria, Rich, James, Balland, Christophe, Bautista, Julian E., Dawson, Kyle, Font-Ribera, Andreu, Guy, Julien, Le Goff, Jean-Marc, Palanque-Delabrouille, Nathalie, Percival, Will J., Pérez-Ràfols, Ignasi, Pieri, Matthew M., Schneider, Donald P., Slosar, Anže, and Yèche, Christophe. Tue . "Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14". United States. doi:10.1051/0004-6361/201935641. https://www.osti.gov/servlets/purl/1569538.
@article{osti_1569538,
title = {Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14},
author = {Blomqvist, Michael and du Mas des Bourboux, Hélion and Busca, Nicolás G. and de Sainte Agathe, Victoria and Rich, James and Balland, Christophe and Bautista, Julian E. and Dawson, Kyle and Font-Ribera, Andreu and Guy, Julien and Le Goff, Jean-Marc and Palanque-Delabrouille, Nathalie and Percival, Will J. and Pérez-Ràfols, Ignasi and Pieri, Matthew M. and Schneider, Donald P. and Slosar, Anže and Yèche, Christophe},
abstractNote = {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.},
doi = {10.1051/0004-6361/201935641},
journal = {Astronomy and Astrophysics},
number = ,
volume = 629,
place = {United States},
year = {2019},
month = {9}
}

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