skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Measurement of baryon acoustic oscillation correlations at z=2.3 with SDSS DR12 Lya-Forests [Measurements of BAO correlations at z = 2.3 with SDSS DR12 Lyα-Forests]

Abstract

Here, we use flux-transmission correlations in Lyα forests to measure the imprint of baryon acoustic oscillations (BAO). The study uses spectra of 157,783 quasars in the redshift range 2.1 ≤ z ≤ 3.5 from the Sloan Digital Sky Survey (SDSS) Data Release 12 (DR12). Besides the statistical improvements on our previous studies using SDSS DR9 and DR11, we have implemented numerous improvements in the analysis procedure, allowing us to construct a physical model of the correlation function and to investigate potential systematic errors in the determination of the BAO peak position. The Hubble distance, D H = c/H(z), relative to the sound horizon is D H(z = 2.33)/r d = 9.07 ± 0.31. The best-determined combination of comoving angular-diameter distance, D M, and the Hubble distance is found to be D 0.7 HD 0.3 M/r d = 13.94 ± 0.35. This value is 1.028 ± 0.026 times the prediction of the flat- ΛCDM model consistent with the cosmic microwave background (CMB) anisotropy spectrum. The errors include marginalization over the effects of unidentified high-density absorption systems and fluctuations in ultraviolet ionizing radiation. Independently of the CMB measurements, the combination of our results and other BAO observations determine the open-ΛCDM density parametersmore » to be Ω M = 0.296 ± 0.029, Ω Λ = 0.699 ± 0.100 and Ω k = –0.002 ± 0.119.« less

Authors:
 [1];  [2];  [3];  [4];  [5];  [4];  [5];  [6];  [7];  [8];  [9];  [4];  [9];  [10];  [10];  [1];  [1];  [11];  [12];  [13] more »;  [4];  [5];  [13];  [14];  [15];  [16];  [17] « less
  1. Univ. of Utah, Salt Lake City, UT (United States)
  2. Univ. Paris Diderot-Paris, Paris (France)
  3. Univ. Pierre et Marie Curie Paris 6, Univ. Denis Diderot Paris 7, Paris Cedex (France)
  4. Univ. Paris-Saclay, Gif-sur-Yvette (France)
  5. Aix-Marseille Univ., CNRS LAM (Lab. d'Astrophysique de Marseille), Marseille (France)
  6. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. College London, London (United Kingdom)
  7. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. Ecole Polytechnique Federale de Lausanne, Lausanne (Switzlerland)
  9. Univ. of California, Irvine, CA (United States)
  10. Brookhaven National Lab. (BNL), Upton, NY (United States)
  11. Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States)
  12. Institucio Catalana de Recerca i Estudis Avancats, Barcelona (Spain); Univ. de Barcelona (UB-IEEC) (Catalonia)
  13. Univ. Paris 6 et CNRS, Paris (France)
  14. Univ. of Edinburgh, Edinburgh (United Kingdom)
  15. The Pennsylvania State Univ., University Park, PA (United States)
  16. The Ohio State Univ., Columbus, OH (United States)
  17. Univ. Paris-Saclay, Gif-sur-Yvette (France); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP) (SC-25)
OSTI Identifier:
1351746
Report Number(s):
BNL-113763-2017-JA
Journal ID: ISSN 0004-6361
Grant/Contract Number:
SC00112704
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Astronomy and Astrophysics
Additional Journal Information:
Journal Volume: 603; Journal ID: ISSN 0004-6361
Publisher:
EDP Sciences
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; cosmology; Lyα forest; large scale structure; dark energy

Citation Formats

Bautista, Julian E., Busca, Nicolas G., Guy, Julien, Rich, James, Blomqvist, Michael, des Bourboux, Helion du Mas, Pieri, Matthew M., Font-Ribera, Andreu, Bailey, Stephen, Delubac, Timothee, Kirkby, David, LeGoff, Jean-Marc, Margala, Daniel, Slosar, Anze, Vazquez, Jose Alberto, Brownstein, Joel R., Dawson, Kyle S., Eisenstein, Daniel J., Miralda-Escude, Jordi, Noterdaeme, Pasquier, Palanque-Delabrouille, Nathalie, Paris, Isabelle, Petitjean, Patrick, Ross, Nicholas P., Schneider, Donald P., Weinberg, David H., and Yeche, Christopher. Measurement of baryon acoustic oscillation correlations at z=2.3 with SDSS DR12 Lya-Forests [Measurements of BAO correlations at z = 2.3 with SDSS DR12 Lyα-Forests]. United States: N. p., 2017. Web. doi:10.1051/0004-6361/201730533.
Bautista, Julian E., Busca, Nicolas G., Guy, Julien, Rich, James, Blomqvist, Michael, des Bourboux, Helion du Mas, Pieri, Matthew M., Font-Ribera, Andreu, Bailey, Stephen, Delubac, Timothee, Kirkby, David, LeGoff, Jean-Marc, Margala, Daniel, Slosar, Anze, Vazquez, Jose Alberto, Brownstein, Joel R., Dawson, Kyle S., Eisenstein, Daniel J., Miralda-Escude, Jordi, Noterdaeme, Pasquier, Palanque-Delabrouille, Nathalie, Paris, Isabelle, Petitjean, Patrick, Ross, Nicholas P., Schneider, Donald P., Weinberg, David H., & Yeche, Christopher. Measurement of baryon acoustic oscillation correlations at z=2.3 with SDSS DR12 Lya-Forests [Measurements of BAO correlations at z = 2.3 with SDSS DR12 Lyα-Forests]. United States. doi:10.1051/0004-6361/201730533.
Bautista, Julian E., Busca, Nicolas G., Guy, Julien, Rich, James, Blomqvist, Michael, des Bourboux, Helion du Mas, Pieri, Matthew M., Font-Ribera, Andreu, Bailey, Stephen, Delubac, Timothee, Kirkby, David, LeGoff, Jean-Marc, Margala, Daniel, Slosar, Anze, Vazquez, Jose Alberto, Brownstein, Joel R., Dawson, Kyle S., Eisenstein, Daniel J., Miralda-Escude, Jordi, Noterdaeme, Pasquier, Palanque-Delabrouille, Nathalie, Paris, Isabelle, Petitjean, Patrick, Ross, Nicholas P., Schneider, Donald P., Weinberg, David H., and Yeche, Christopher. Thu . "Measurement of baryon acoustic oscillation correlations at z=2.3 with SDSS DR12 Lya-Forests [Measurements of BAO correlations at z = 2.3 with SDSS DR12 Lyα-Forests]". United States. doi:10.1051/0004-6361/201730533. https://www.osti.gov/servlets/purl/1351746.
@article{osti_1351746,
title = {Measurement of baryon acoustic oscillation correlations at z=2.3 with SDSS DR12 Lya-Forests [Measurements of BAO correlations at z = 2.3 with SDSS DR12 Lyα-Forests]},
author = {Bautista, Julian E. and Busca, Nicolas G. and Guy, Julien and Rich, James and Blomqvist, Michael and des Bourboux, Helion du Mas and Pieri, Matthew M. and Font-Ribera, Andreu and Bailey, Stephen and Delubac, Timothee and Kirkby, David and LeGoff, Jean-Marc and Margala, Daniel and Slosar, Anze and Vazquez, Jose Alberto and Brownstein, Joel R. and Dawson, Kyle S. and Eisenstein, Daniel J. and Miralda-Escude, Jordi and Noterdaeme, Pasquier and Palanque-Delabrouille, Nathalie and Paris, Isabelle and Petitjean, Patrick and Ross, Nicholas P. and Schneider, Donald P. and Weinberg, David H. and Yeche, Christopher},
abstractNote = {Here, we use flux-transmission correlations in Lyα forests to measure the imprint of baryon acoustic oscillations (BAO). The study uses spectra of 157,783 quasars in the redshift range 2.1 ≤ z ≤ 3.5 from the Sloan Digital Sky Survey (SDSS) Data Release 12 (DR12). Besides the statistical improvements on our previous studies using SDSS DR9 and DR11, we have implemented numerous improvements in the analysis procedure, allowing us to construct a physical model of the correlation function and to investigate potential systematic errors in the determination of the BAO peak position. The Hubble distance, DH = c/H(z), relative to the sound horizon is DH(z = 2.33)/rd = 9.07 ± 0.31. The best-determined combination of comoving angular-diameter distance, DM, and the Hubble distance is found to be D0.7HD0.3M/rd = 13.94 ± 0.35. This value is 1.028 ± 0.026 times the prediction of the flat- ΛCDM model consistent with the cosmic microwave background (CMB) anisotropy spectrum. The errors include marginalization over the effects of unidentified high-density absorption systems and fluctuations in ultraviolet ionizing radiation. Independently of the CMB measurements, the combination of our results and other BAO observations determine the open-ΛCDM density parameters to be ΩM = 0.296 ± 0.029, ΩΛ = 0.699 ± 0.100 and Ωk = –0.002 ± 0.119.},
doi = {10.1051/0004-6361/201730533},
journal = {Astronomy and Astrophysics},
number = ,
volume = 603,
place = {United States},
year = {Thu Mar 23 00:00:00 EDT 2017},
month = {Thu Mar 23 00:00:00 EDT 2017}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 12works
Citation information provided by
Web of Science

Save / Share:
  • Here, we present an anisotropic analysis of the baryon acoustic oscillation (BAO) scale in the twelfth and final data release of the Baryon Oscillation Spectroscopic Survey (BOSS). We independently analyse the LOWZ and CMASS galaxy samples: the LOWZ sample contains 361 762 galaxies with an effective redshift of zLOWZ = 0.32; the CMASS sample consists of 777 202 galaxies with an effective redshift of zCMASS = 0.57. We extract the BAO peak position from the monopole power-spectrum moment, α0, and from the μ 2 moment, α2, where μ is the cosine of the angle to the line of sight. Themore » μ 2-moment provides equivalent information to that available in the quadrupole but is simpler to analyse. After applying a reconstruction algorithm to reduce the BAO suppression by bulk motions, we measure the BAO peak position in the monopole and μ 2-moment, which are related to radial and angular shifts in scale. We report H(zLOWZ)r s(zd) = (11.60 ± 0.60) × 10 3 km s -1 and D A(zLOWZ)/r s(zd) = 6.66 ± 0.16 with a cross-correlation coefficient of rHD A = 0.41, for the LOWZ sample; and H(zCMASS)r s(zd) = (14.56 ± 0.37) × 10 3 km s -1 and D A(zCMASS)/r s(z d) = 9.42 ± 0.13 with a cross-correlation coefficient of rHD A = 0.47, for the CMASS sample.« less
  • We present the large-scale 3-point correlation function (3PCF) of the SDSS DR12 CMASS sample of 777,202 Luminous Red Galaxies, the largest-ever sample used for a 3PCF or bispectrum measurement. We make the first high-significance (4.5σ) detection of Baryon Acoustic Oscillations (BAO) in the 3PCF. Using these acoustic features in the 3PCF as a standard ruler, we measure the distance to z=0.57 to 1.7% precision (statistical plus systematic). We find D V = 2024 ± 29Mpc (stat) ± 20Mpc(sys) for our fiducial cosmology (consistent with Planck 2015) and bias model. This measurement extends the use of the BAO technique from themore » 2-point correlation function (2PCF) and power spectrum to the 3PCF and opens an avenue for deriving additional cosmological distance information from future large-scale structure redshift surveys such as DESI. Our measured distance scale from the 3PCF is fairly independent from that derived from the pre-reconstruction 2PCF and is equivalent to increasing the length of BOSS by roughly 10%; reconstruction appears to lower the independence of the distance measurements. In conclusion, fitting a model including tidal tensor bias yields a moderate significance (2.6σ) detection of this bias with a value in agreement with the prediction from local Lagrangian biasing.« less
  • We present the large-scale 3-point correlation function (3PCF) of the SDSS DR12 CMASS sample of 777,202 Luminous Red Galaxies, the largest-ever sample used for a 3PCF or bispectrum measurement. We make the first high-significance (4.5σ) detection of Baryon Acoustic Oscillations (BAO) in the 3PCF. Using these acoustic features in the 3PCF as a standard ruler, we measure the distance to z=0.57 to 1.7% precision (statistical plus systematic). We find D V = 2024 ± 29Mpc (stat) ± 20Mpc(sys) for our fiducial cosmology (consistent with Planck 2015) and bias model. This measurement extends the use of the BAO technique from themore » 2-point correlation function (2PCF) and power spectrum to the 3PCF and opens an avenue for deriving additional cosmological distance information from future large-scale structure redshift surveys such as DESI. Our measured distance scale from the 3PCF is fairly independent from that derived from the pre-reconstruction 2PCF and is equivalent to increasing the length of BOSS by roughly 10%; reconstruction appears to lower the independence of the distance measurements. In conclusion, fitting a model including tidal tensor bias yields a moderate significance (2.6σ) detection of this bias with a value in agreement with the prediction from local Lagrangian biasing.« less
  • We analyze the broad-range shape of the monopole and quadrupole correlation functions of the BOSS Data Release 12 (DR12) CMASS and LOWZ galaxy sample to obtain constraints on the Hubble expansion rate H(z), the angular-diameter distance DA(z), the normalised growth rate f(z)σ 8(z), and the physical matter density Ω mh 2. In addition, we adopt wide and flat priors on all model parameters in order to ensure the results are those of a `single-probe' galaxy clustering analysis. We also marginalize over three nuisance terms that account for potential observational systematics affecting the measured monopole. However, such Monte Carlo Markov Chainmore » analysis is computationally expensive for advanced theoretical models, thus we develop a new methodology to speed up our analysis.« less
  • We present a measurement of baryon acoustic oscillations (BAO) in the cross-correlation of quasars with the Lyα-forest flux-transmission at a mean redshift z = 2.40. The measurement uses the complete SDSS-III data sample: 168,889 forests and 234,367 quasars from the SDSS Data Release DR12. In addition to the statistical improvement on our previous study using DR11, we have implemented numerous improvements at the analysis level allowing a more accurate measurement of this cross-correlation. We also developed the first simulations of the cross-correlation allowing us to test different aspects of our data analysis and to search for potential systematic errors inmore » the determination of the BAO peak position. We measure the two ratios D H(z = 2.40)=r d = 9.01 ± 0.36 and D M(z = 2.40)=r d = 35.7 ±1.7, where the errors include marginalization over the non-linear velocity of quasars and the metal - quasar cross-correlation contribution, among other effects. These results are within 1.8σ of the prediction of the flat-ΛCDM model describing the observed CMB anisotropies.We combine this study with the Lyα-forest auto-correlation function (Bautista et al. 2017), yielding D H(z = 2.40)=r d = 8.94 ± 0.22 and D M(z = 2.40)=r d = 36.6 ± 1.2, within 2.3σ of the same flat-ΛCDM model.« less
    Cited by 1