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

Abstract

We measure the imprint of primordial baryon acoustic oscillations (BAOs) in the correlation function of Ly αabsorption 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(Ly α) region, we use Ly αabsorption in the Lyman- βregion of 56 154 spectra for the first time. We measure the Hubble distance, D H, and the comoving angular diameter distance, D M, relative to the sound horizon at the drag epoch r dat an effective redshift z = 2.34. Using a physical model of the correlation function outside the BAO peak, we find D H(2.34)/ r d = 8.86 ± 0.29 and D M(2.34)/ r d = 37.41 ± 1.86, within 1 σfrom 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-Ly αcross-correlation measurement presented in a companion paper, the BAO measurements at z = 2.35 are within 1.7 σof the predictions of this model.

Authors:
 [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)
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:
1570659
Report Number(s):
BNL-212173-2019-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; cosmological parameters; dark energy; cosmology; observations

Citation Formats

de Sainte Agathe, Victoria, Balland, Christophe, du Mas des Bourboux, Hélion, Busca, Nicolás G., Blomqvist, Michael, Guy, Julien, Rich, James, Font-Ribera, Andreu, Pieri, Matthew M., Bautista, Julian E., Dawson, Kyle, Le Goff, Jean-Marc, de la Macorra, Axel, Palanque-Delabrouille, Nathalie, Percival, Will J., Pérez-Ràfols, Ignasi, Schneider, Donald P., Slosar, Anže, and Yèche, Christophe. Baryon acoustic oscillations at z = 2.34 from the correlations of Ly α absorption in eBOSS DR14. United States: N. p., 2019. Web. doi:10.1051/0004-6361/201935638.
de Sainte Agathe, Victoria, Balland, Christophe, du Mas des Bourboux, Hélion, Busca, Nicolás G., Blomqvist, Michael, Guy, Julien, Rich, James, Font-Ribera, Andreu, Pieri, Matthew M., Bautista, Julian E., Dawson, Kyle, Le Goff, Jean-Marc, de la Macorra, Axel, Palanque-Delabrouille, Nathalie, Percival, Will J., Pérez-Ràfols, Ignasi, Schneider, Donald P., Slosar, Anže, & Yèche, Christophe. Baryon acoustic oscillations at z = 2.34 from the correlations of Ly α absorption in eBOSS DR14. United States. doi:10.1051/0004-6361/201935638.
de Sainte Agathe, Victoria, Balland, Christophe, du Mas des Bourboux, Hélion, Busca, Nicolás G., Blomqvist, Michael, Guy, Julien, Rich, James, Font-Ribera, Andreu, Pieri, Matthew M., Bautista, Julian E., Dawson, Kyle, Le Goff, Jean-Marc, de la Macorra, Axel, Palanque-Delabrouille, Nathalie, Percival, Will J., Pérez-Ràfols, Ignasi, Schneider, Donald P., Slosar, Anže, and Yèche, Christophe. Tue . "Baryon acoustic oscillations at z = 2.34 from the correlations of Ly α absorption in eBOSS DR14". United States. doi:10.1051/0004-6361/201935638. https://www.osti.gov/servlets/purl/1570659.
@article{osti_1570659,
title = {Baryon acoustic oscillations at z = 2.34 from the correlations of Ly α absorption in eBOSS DR14},
author = {de Sainte Agathe, Victoria and Balland, Christophe and du Mas des Bourboux, Hélion and Busca, Nicolás G. and Blomqvist, Michael and Guy, Julien and Rich, James and Font-Ribera, Andreu and Pieri, Matthew M. and Bautista, Julian E. and Dawson, Kyle and Le Goff, Jean-Marc and de la Macorra, Axel and Palanque-Delabrouille, Nathalie and Percival, Will J. and Pérez-Ràfols, Ignasi and Schneider, Donald P. and Slosar, Anže and Yèche, Christophe},
abstractNote = {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.},
doi = {10.1051/0004-6361/201935638},
journal = {Astronomy and Astrophysics},
number = ,
volume = 629,
place = {United States},
year = {2019},
month = {9}
}

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