The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations with Lyα Forests

By Hélion Du Mas des Bourboux, J. Rich, A. Font-Ribera, Victoria de Sainte Agathe, J. Farr, T. Etourneau, J. Le Goff, A. Cuceu, C. Balland, Julián Bautista and 29 more. Astrophysical Journal, 2020

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We present a measurement of baryonic acoustic oscillations (BAOs) from Lyα absorption and quasars at an effective redshift 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 z q > 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 z q > 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 and , 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 Δχ 2 surfaces are publicly available.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/82eae76ff7a8067052a517ef609f0c25d6bd356d

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Citations in the corpus

Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory (2020, methodology): “The auto- and cross-correlation measurements can also be combined into a single estimate of DM (z)/rd and DH(z)/rd with associated covariances (du Mas des Bourboux et al. 2020), resulting in a 25% reduction in the area of the contours relative to the BOSS DR12 studies.”
Data Release 1 of the Dark Energy Spectroscopic Instrument (2025, unknown): “The fluctuations in the calibration region ( rest-frame wavelength from 1600 to 1850 Å ) , the Ly α region A ( rest-frame wavelength from 1040 to 1205 Å ) , and the Ly β region B ( rest-frame wavelength from 920 to 1020 Å ) were obtained using the Python Code for Intergalactic medium Cosmologi-cal-C”
The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters (2023, methodology): “We do not use the higher-redshift Emission Line Galaxy (ELG; Comparat et al. 2016), Lyman-α (du Mas des Bourboux et al. 2020), and quasar samples (Hou et al. 2021), though we hope to include these in future analyses.”
The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: BAO and RSD measurements from anisotropic clustering analysis of the quasar sample in configuration space between redshift 0.8 and 2.2 (2020, background): “…al. (2020), LRG sample (Gil-Maŕın et al. 2020; Bautista et al. 2020), ELG sample (Tamone et al. 2020; de Mattia et al. 2020), together with the BAO analyses of Lyα forest (du Mas des Bourboux et al. 2020) will enter eBOSS collaboration et al. (2020) for the cosmological implications from eBOSS1.”
An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment (2022, background): “…Ross et al. 2015; Alam et al. 2017, 2021) or photometric (Seo et al. 2012; DES Collaboration et al. 2019, 2021) catalogs, and at higher redshifts in Lyman-alpha systems (e.g. Busca et al. 2013; Slosar et al. 2013; du Mas des Bourboux et al. 2020) and quasars (Ata et al. 2018; Neveux et al. 2020).”
Target Selection and Validation of DESI Quasars (2022, background): “This field of research has developed over more than two decades (McDonald 2003; Busca et al. 2013; Slosar et al. 2013) and reached its peak with the two recent publications of eBOSS (Chabanier et al. 2019; du Mas des Bourboux et al. 2020).”
Validation of the Scientific Program for the Dark Energy Spectroscopic Instrument (2023, methodology): “2 while those using the Ly-α forest (du Mas des Bourboux et al. 2020) relied on quasars at red-shifts z > 2 .”
The Pantheon+ Analysis: Cosmological Constraints (2022, methodology): “…SDSS Extended Baryon Oscillation Spectroscopic Survey (eBOSS) Luminous Red Galaxy (Bautista et al. 2020), SDSS eBOSS Emission Line Galaxies (Bautista et al. 2020), SDSS eBOSS Quasar (Hou et al. 2020), SDSS eBOSS Lyα (du Mas des Bourboux et al. 2020), all of which have been implemented in CosmoSIS.”