Baryon acoustic oscillations at z=2.34 from the correlations of Lyα absorption in eBOSS DR14

被引:191
作者
de Sainte Agathe, Victoria [1 ]
Balland, Christophe [1 ]
des Bourboux, Helion du Mas [2 ]
Busca, Nicolas G. [1 ]
Blomqvist, Michael [3 ]
Guy, Julien [4 ]
Rich, James [5 ]
Font-Ribera, Andreu [6 ]
Pieri, Matthew M. [3 ]
Bautista, Julian E. [7 ]
Dawson, Kyle [2 ]
Le Goff, Jean-Marc [5 ]
de la Macorra, Axel [8 ]
Palanque-Delabrouille, Nathalie [5 ]
Percival, Will J. [9 ]
Perez-Rafols, Ignasi [3 ]
Schneider, Donald P. [10 ,11 ]
Slosar, Anze [12 ]
Yeche, Christophe [5 ]
机构
[1] Univ Paris Diderot, Sorbonne Univ, LPNHE, CNRS,IN2P3, 4 Pl Jussieu, F-75252 Paris, France
[2] Univ Utah, Dept Phys & Astron, 115 S 1400 E, Salt Lake City, UT 84112 USA
[3] Aix Marseille Univ, CNRS, CNES, LAM, Marseille, France
[4] Lawrence Berkeley Natl Lab, 1 Cyclotron Rd, Berkeley, CA 94720 USA
[5] Univ Paris Saclay, CEA, IRFU, F-91191 Gif Sur Yvette, France
[6] UCL, Gower St, London WC1E 6BT, England
[7] Univ Portsmouth, Inst Cosmol & Gravitat, Dennis Sciama Bldg, Portsmouth PO1 3FX, Hants, England
[8] Univ Nacl Autonoma Mexico, Inst Astron, AP 70-264, Mexico City 04510, DF, Mexico
[9] Univ Waterloo, Dept Phys & Astron, 200 Univ Ave W, Waterloo, ON N2L 3G1, Canada
[10] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA
[11] Penn State Univ, Inst Gravitat & Cosmos, University Pk, PA 16802 USA
[12] Brookhaven Natl Lab, 2 Ctr Rd, Upton, NY 11973 USA
基金
美国安德鲁·梅隆基金会;
关键词
cosmology: observations; cosmological parameters; dark energy; QUASAR SAMPLE; POWER-SPECTRUM; REDSHIFT; 0.8; GALAXIES; CONSTRAINTS; GROWTH; SCALE; PEAK;
D O I
10.1051/0004-6361/201935638
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We measure the imprint of primordial baryon acoustic oscillations (BAOs) in the correlation function of Ly alpha absorption 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-alpha (Ly alpha) region, we use Ly alpha absorption in the Lyman-beta region 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(d) at 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 sigma from the flat-Lambda CDM 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 alpha cross-correlation measurement presented in a companion paper, the BAO measurements at z = 2.35 are within 1.7 sigma of the predictions of this model.
引用
收藏
页数:20
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