TY - JOUR
T1 - The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey
T2 - Cosmological implications from multitracer BAO analysis with galaxies and voids
AU - Zhao, Cheng
AU - Variu, Andrei
AU - He, Mengfan
AU - Forero-Sánchez, Daniel
AU - Tamone, Amelie
AU - Chuang, Chia Hsun
AU - Kitaura, Francisco Shu
AU - Tao, Charling
AU - Yu, Jiaxi
AU - Kneib, Jean Paul
AU - Percival, Will J.
AU - Shan, Huanyuan
AU - Zhao, Gong Bo
AU - Burtin, Etienne
AU - Dawson, Kyle S.
AU - Rossi, Graziano
AU - Schneider, Donald P.
AU - De La MacOrra, Axel
N1 - Publisher Copyright:
© 2022 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society.
PY - 2022/4/1
Y1 - 2022/4/1
N2 - We construct cosmic void catalogues with the dive void finder upon SDSS BOSS DR12 and eBOSS DR16 galaxy samples with BAO reconstruction, and perform a joint BAO analysis using different types of galaxies and the corresponding voids. The BAO peak is evident for the galaxy-galaxy, galaxy-void, and void-void correlation functions of all data sets, including the ones cross-correlating LRG and ELG samples. Two multitracer BAO fitting schemes are tested, one combining the galaxy and void correlation functions with a weight applied to voids, and the other using a single BAO dilation parameter for all clustering measurements. Both methods produce consistent results with mock catalogues, and on average ∼10 per cent improvements of the BAO statistical uncertainties are observed for all samples, compared to the results from galaxies alone. By combining the clustering of galaxies and voids, the uncertainties of BAO measurements from the SDSS data are reduced by 5-15 per cent, yielding 0.9 per cent, 0.8 per cent, 1.1 per cent, 2.3 per cent, and 2.9 per cent constraints on the distance D V(z), at effective redshifts 0.38, 0.51, 0.70, 0.77, and 0.85, respectively. When combined with BAO measurements from SDSS MGS, QSO, and Lyα samples, as well as the BBN results, we obtain H_0 = 67.58 pm 0.91 km, s-1, Mpc-1,m = 0.290 ± 0.015, and Ω Λ h2 = 0.3241\pm 0.0079 in the flat-ΛCDM framework, where the 1σ uncertainties are around 6 per cent, 6 per cent, and 17 per cent smaller respectively, compared to constraints from the corresponding anisotropic BAO measurements without voids and LRG-ELG cross-correlations.
AB - We construct cosmic void catalogues with the dive void finder upon SDSS BOSS DR12 and eBOSS DR16 galaxy samples with BAO reconstruction, and perform a joint BAO analysis using different types of galaxies and the corresponding voids. The BAO peak is evident for the galaxy-galaxy, galaxy-void, and void-void correlation functions of all data sets, including the ones cross-correlating LRG and ELG samples. Two multitracer BAO fitting schemes are tested, one combining the galaxy and void correlation functions with a weight applied to voids, and the other using a single BAO dilation parameter for all clustering measurements. Both methods produce consistent results with mock catalogues, and on average ∼10 per cent improvements of the BAO statistical uncertainties are observed for all samples, compared to the results from galaxies alone. By combining the clustering of galaxies and voids, the uncertainties of BAO measurements from the SDSS data are reduced by 5-15 per cent, yielding 0.9 per cent, 0.8 per cent, 1.1 per cent, 2.3 per cent, and 2.9 per cent constraints on the distance D V(z), at effective redshifts 0.38, 0.51, 0.70, 0.77, and 0.85, respectively. When combined with BAO measurements from SDSS MGS, QSO, and Lyα samples, as well as the BBN results, we obtain H_0 = 67.58 pm 0.91 km, s-1, Mpc-1,m = 0.290 ± 0.015, and Ω Λ h2 = 0.3241\pm 0.0079 in the flat-ΛCDM framework, where the 1σ uncertainties are around 6 per cent, 6 per cent, and 17 per cent smaller respectively, compared to constraints from the corresponding anisotropic BAO measurements without voids and LRG-ELG cross-correlations.
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U2 - 10.1093/mnras/stac390
DO - 10.1093/mnras/stac390
M3 - Article
AN - SCOPUS:85127441896
SN - 0035-8711
VL - 511
SP - 5492
EP - 5524
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 4
ER -