Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14
Abstract
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.
- Authors:
-
- Aix-Marseille Univ., and CNRS, Marseille (France)
- Univ. of Utah, Salt Lake City, UT (United States)
- Sorbonne Univ., Paris (France). Lab. de Physique Nucléaire et de Hautes Energies (LPNHE)
- Univ. Paris-Saclay, Gif-sur-Yvette (France)
- Univ. of Portsmouth (United Kingdom)
- Univ. College London, London (United Kingdom)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Univ. of Waterloo, ON (Canada)
- Pennsylvania State Univ., University Park, PA (United States)
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- OSTI Identifier:
- 1569538
- Report Number(s):
- BNL-212171-2019-JAAM
Journal ID: ISSN 0004-6361; TRN: US2001116
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Astronomy and Astrophysics
- Additional Journal Information:
- Journal Volume: 629; Journal ID: ISSN 0004-6361
- Publisher:
- EDP Sciences
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 79 ASTRONOMY AND ASTROPHYSICS
Citation Formats
Blomqvist, Michael, du Mas des Bourboux, Hélion, Busca, Nicolás G., de Sainte Agathe, Victoria, Rich, James, Balland, Christophe, Bautista, Julian E., Dawson, Kyle, Font-Ribera, Andreu, Guy, Julien, Le Goff, Jean-Marc, Palanque-Delabrouille, Nathalie, Percival, Will J., Pérez-Ràfols, Ignasi, Pieri, Matthew M., Schneider, Donald P., Slosar, Anže, and Yèche, Christophe. Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14. United States: N. p., 2019.
Web. doi:10.1051/0004-6361/201935641.
Blomqvist, Michael, du Mas des Bourboux, Hélion, Busca, Nicolás G., de Sainte Agathe, Victoria, Rich, James, Balland, Christophe, Bautista, Julian E., Dawson, Kyle, Font-Ribera, Andreu, Guy, Julien, Le Goff, Jean-Marc, Palanque-Delabrouille, Nathalie, Percival, Will J., Pérez-Ràfols, Ignasi, Pieri, Matthew M., Schneider, Donald P., Slosar, Anže, & Yèche, Christophe. Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14. United States. doi:10.1051/0004-6361/201935641.
Blomqvist, Michael, du Mas des Bourboux, Hélion, Busca, Nicolás G., de Sainte Agathe, Victoria, Rich, James, Balland, Christophe, Bautista, Julian E., Dawson, Kyle, Font-Ribera, Andreu, Guy, Julien, Le Goff, Jean-Marc, Palanque-Delabrouille, Nathalie, Percival, Will J., Pérez-Ràfols, Ignasi, Pieri, Matthew M., Schneider, Donald P., Slosar, Anže, and Yèche, Christophe. Tue .
"Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14". United States. doi:10.1051/0004-6361/201935641. https://www.osti.gov/servlets/purl/1569538.
@article{osti_1569538,
title = {Baryon acoustic oscillations from the cross-correlation of Lyα absorption and quasars in eBOSS DR14},
author = {Blomqvist, Michael and du Mas des Bourboux, Hélion and Busca, Nicolás G. and de Sainte Agathe, Victoria and Rich, James and Balland, Christophe and Bautista, Julian E. and Dawson, Kyle and Font-Ribera, Andreu and Guy, Julien and Le Goff, Jean-Marc and Palanque-Delabrouille, Nathalie and Percival, Will J. and Pérez-Ràfols, Ignasi and Pieri, Matthew M. and Schneider, Donald P. and Slosar, Anže and Yèche, Christophe},
abstractNote = {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.},
doi = {10.1051/0004-6361/201935641},
journal = {Astronomy and Astrophysics},
number = ,
volume = 629,
place = {United States},
year = {2019},
month = {9}
}
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Figures / Tables:
Fig. 1: Sky distribution for sample of 266,590 tracer quasars (1.77 < $z$$q$< 3.5) from DR14Q in J2000 equatorial coordinates. The solid black curve is the Galactic plane. The high-density regions are the eBOSS and SEQUELS observations (for the northern regions of the two Galactic hemispheres) and SDSS-stripe 82 (formore »
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