TY - JOUR
T1 - The completed SDSS-IV extended baryon oscillation spectroscopic survey
T2 - Baryon acoustic oscillations with lyα forests
AU - du Mas des Bourboux, Hélion
AU - Rich, James
AU - Font-Ribera, Andreu
AU - de Sainte Agathe, Victoria
AU - Farr, James
AU - Etourneau, Thomas
AU - Le Goff, Jean Marc
AU - Cuceu, Andrei
AU - Balland, Christophe
AU - Bautista, Julian E.
AU - Blomqvist, Michael
AU - Brinkmann, Jonathan
AU - Brownstein, Joel R.
AU - Chabanier, Solène
AU - Chaussidon, Edmond
AU - Dawson, Kyle
AU - González-Morales, Alma X.
AU - Guy, Julien
AU - Lyke, Brad W.
AU - de la Macorra, Axel
AU - Mueller, Eva Maria
AU - Myers, Adam D.
AU - Nitschelm, Christian
AU - Gutiérrez, Andrea Muñoz
AU - Palanque-Delabrouille, Nathalie
AU - Parker, James
AU - Percival, Will J.
AU - Pérez-Ràfols, Ignasi
AU - Petitjean, Patrick
AU - Pieri, Matthew M.
AU - Ravoux, Corentin
AU - Rossi, Graziano
AU - Schneider, Donald P.
AU - Seo, Hee Jong
AU - Slosar, Anže
AU - Stermer, Julianna
AU - Vivek, M.
AU - Yèche, Christophe
AU - Youles, Samantha
N1 - Publisher Copyright:
© 2020. The American Astronomical Society. All rights reserved.
PY - 2020/10/1
Y1 - 2020/10/1
N2 - We present a measurement of baryonic acoustic oscillations (BAOs) from Lyα absorption and quasars at an effective redshift z = 2.33 using the complete extended Baryonic Oscillation Spectroscopic Survey (eBOSS). The 16th and final eBOSS data release (SDSS DR16) contains all data from eBOSS and its predecessor, the Baryonic Oscillation Spectroscopic Survey (BOSS), providing 210,005 quasars with zq > 2.10 that are used to measure Lyα absorption. We measure the BAO scale both in the autocorrelation of Lyα absorption and in its cross-correlation with 341,468 quasars with redshift zq > 1.77. Apart from the statistical gain from new quasars and deeper observations, the main improvements over previous work come from more accurate modeling of physical and instrumental correlations and the use of new sets of mock data. Combining the BAO measurement from the auto- and cross-correlation yields the constraints of the two ratios DH(z = 2.33) rd = 8.99 ± 0.19 and DM(z = 2.33) rd = 37.5 ± 1.1, where the error bars are statistical. These results are within 1.5σ of the prediction of the flat-ΛCDM cosmology of Planck (2016). The analysis code, picca, the catalog of the flux transmission field measurements, and the Δχ2 surfaces are publicly available.
AB - We present a measurement of baryonic acoustic oscillations (BAOs) from Lyα absorption and quasars at an effective redshift z = 2.33 using the complete extended Baryonic Oscillation Spectroscopic Survey (eBOSS). The 16th and final eBOSS data release (SDSS DR16) contains all data from eBOSS and its predecessor, the Baryonic Oscillation Spectroscopic Survey (BOSS), providing 210,005 quasars with zq > 2.10 that are used to measure Lyα absorption. We measure the BAO scale both in the autocorrelation of Lyα absorption and in its cross-correlation with 341,468 quasars with redshift zq > 1.77. Apart from the statistical gain from new quasars and deeper observations, the main improvements over previous work come from more accurate modeling of physical and instrumental correlations and the use of new sets of mock data. Combining the BAO measurement from the auto- and cross-correlation yields the constraints of the two ratios DH(z = 2.33) rd = 8.99 ± 0.19 and DM(z = 2.33) rd = 37.5 ± 1.1, where the error bars are statistical. These results are within 1.5σ of the prediction of the flat-ΛCDM cosmology of Planck (2016). The analysis code, picca, the catalog of the flux transmission field measurements, and the Δχ2 surfaces are publicly available.
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U2 - 10.3847/1538-4357/abb085
DO - 10.3847/1538-4357/abb085
M3 - Article
AN - SCOPUS:85092643552
SN - 0004-637X
VL - 901
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2
M1 - 153
ER -