Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14

By M. Blomqvist, Hélion Marie du Mas des Bourboux, N. Busca, Victoria de Sainte Agathe, J. Rich, C. Balland, Julián Bautista, K. Dawson, A. Font-Ribera, J. Guy and 8 more. Astronomy & Astrophysics, 2019

233 citations recorded by the source corpus.

We present a measurement of the baryon acoustic oscillation (BAO) scale at redshift z = 2.35 from the three-dimensional correlation of Lyman-α (Lyα) forest absorption and quasars. The study uses 266 590 quasars in the redshift range 1.77 < z < 3.5 from the Sloan Digital Sky Survey (SDSS) Data Release 14 (DR14). The sample includes the first two years of observations by the SDSS-IV extended Baryon Oscillation Spectroscopic Survey (eBOSS), providing new quasars and re-observations of BOSS quasars for improved statistical precision. Statistics are further improved by including Lyα absorption occurring in the Lyβ wavelength band of the spectra. From the measured BAO peak position along and across the line of sight, we determined the Hubble distance DH and the comoving angular diameter distance DM relative to the sound horizon at the drag epoch rd: DH(z = 2.35)/rd = 9.20 ± 0.36 and DM(z = 2.35)/rd = 36.3 ± 1.8. These results are consistent at 1.5σ with the prediction of the best-fit spatially-flat cosmological model with the cosmological constant reported for the Planck (2016) analysis of cosmic microwave background anisotropies. Combined with the Lyα auto-correlation measurement presented in a companion paper, the BAO measurements at z = 2.34 are within 1.7σ of the predictions of this model.

Subfields: Astronomy and Astrophysics, Instrumentation

View Paper: https://www.semanticscholar.org/paper/44d2d8de92de6c435fb8f5f82e9b28d6014f401c

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Citations in the corpus

The BAO+BBN take on the Hubble tension (2019, methodology): “Our results are slightly less in tension with SH0ES than those of [31, 32] because we use a realistic”
The Hubble tension in light of the Full-Shape analysis of Large-Scale Structure data (2020, methodology): “When quoting BAO, we also include measurements at small redshift from 6DF [72] and SDSS DR7 MGS [73], as well as high-redshift Lyman-α forest auto-correlation and cross-correlation with quasars from eBOSS DR14 measurements [74, 75].”
The Completed SDSS-IV Extended Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations with Lyα Forests (2020, background): “…Lyα autocorrelation function (Busca et al. 2013; Kirkby et al. 2013; Slosar et al. 2013; Delubac et al. 2015; Bautista et al. 2017; de Sainte Agathe et al. 2019), and then in the Lyα–quasar cross-correlation function (Font-Ribera et al. 2014; du Mas des Bourboux et al. 2017; Blomqvist et al. 2019).”
A Simple Phenomenological Emergent Dark Energy Model can Resolve the Hubble Tension (2019, methodology): “In addition to these lower BAO measurement, a higher redshift BAO measurement which is derived from the cross-correlation of Lyα absorption and quasars in eBOSS DR14 was also used (Blomqvist et al. 2019; de Sainte Agathe et al. 2019).”
Baryon acoustic oscillations at z = 2.34 from the correlations of Lyα absorption in eBOSS DR14 (2019, methodology): “Combining the measurement of Lyα auto-correlation (this paper) with the quasar - Lyα cross-correlation of Blomqvist et al. (2019), the BAO measurements at z = 2.34 are within 1.7σ of the predictions of the Pl2015 model.”
Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological implications from two decades of spectroscopic surveys at the Apache Point Observatory (2020, background): “…between the Mg II forest and galaxy and quasar tracers (du Mas des Bourboux et al. 2019), between the C IV forest and quasars at z > 2 (Blomqvist et al. 2019), and finally, in the cross-correlation between spectroscopic quasars and high redshift galaxies (Zarrouk et al. 2020)…”
Limits on wCDM from the EFTofLSS with the PyBird code (2020, methodology): “When quoting BAO, we also include measurements at small redshift from 6DF [56] and SDSS DR7 MGS [57], as well as high redshift Lyman-α forest auto-correlation and crosscorrelation with quasars from eBOSS DR14 measurements [58, 59].”
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, methodology): “…galaxy sample (MGS) for the distance measurement (Ross et al. 2015a) and growth rate measurement (Howlett et al. 2015), the constraints from BOSS DR12 LRG sample (Alam et al. 2017), and the combined constraints from eBOSS DR14 Lyα measurements (de Sainte Agathe et al. 2019; Blomqvist et al. 2019).”