TY - JOUR
T1 - The completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey
T2 - A multitracer analysis in Fourier space for measuring the cosmic structure growth and expansion rate
AU - Zhao, Gong Bo
AU - Wang, Yuting
AU - Taruya, Atsushi
AU - Zhang, Weibing
AU - Gil-Marín, Héctor
AU - De Mattia, Arnaud
AU - Ross, Ashley J.
AU - Raichoor, Anand
AU - Zhao, Cheng
AU - Percival, Will J.
AU - Alam, Shadab
AU - Bautista, Julian E.
AU - Burtin, Etienne
AU - Chuang, Chia Hsun
AU - Dawson, Kyle S.
AU - Hou, Jiamin
AU - Kneib, Jean Paul
AU - Koyama, Kazuya
AU - Du Mas Des Bourboux, Hélion
AU - Mueller, Eva Maria
AU - Newman, Jeffrey A.
AU - Peacock, John A.
AU - Rossi, Graziano
AU - Ruhlmann-Kleider, Vanina
AU - Schneider, Donald P.
AU - Shafieloo, Arman
N1 - Publisher Copyright:
© 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society.
PY - 2021/6/1
Y1 - 2021/6/1
N2 - We perform a joint BAO and RSD analysis using the eBOSS DR16 LRG and ELG samples in the redshift range of z [0.6, 1.1], and detect an RSD signal from the cross-power spectrum at a ∼4σ confidence level, i.e., fσ8 = 0.317 ± 0.080 at zeff = 0.77. Based on the chained power spectrum, which is a new development in this work to mitigate the angular systematics, we measure the BAO distances and growth rate simultaneously at two effective redshifts, namely, DM/rd (z = 0.70) = 17.96 ± 0.51, DH/rd (z = 0.70) = 21.22 ± 1.20, fσ8 (z = 0.70) = 0.43 ± 0.05, and DM/rd (z = 0.845) = 18.90 ± 0.78, DH/rd (z = 0.845) = 20.91 ± 2.86, fσ8 (z = 0.845) = 0.30 ± 0.08. Combined with BAO measurements including those from the eBOSS DR16 QSO and Lyman-α sample, our measurement has raised the significance level of a non-zero ωΛ to ∼11σ. The data product of this work is publicly available at https://github.com/icosmology/eBOSS_DR16_LRGxELG and https://www.sdss.org/science/final-bao-and-rsd-measurements/.
AB - We perform a joint BAO and RSD analysis using the eBOSS DR16 LRG and ELG samples in the redshift range of z [0.6, 1.1], and detect an RSD signal from the cross-power spectrum at a ∼4σ confidence level, i.e., fσ8 = 0.317 ± 0.080 at zeff = 0.77. Based on the chained power spectrum, which is a new development in this work to mitigate the angular systematics, we measure the BAO distances and growth rate simultaneously at two effective redshifts, namely, DM/rd (z = 0.70) = 17.96 ± 0.51, DH/rd (z = 0.70) = 21.22 ± 1.20, fσ8 (z = 0.70) = 0.43 ± 0.05, and DM/rd (z = 0.845) = 18.90 ± 0.78, DH/rd (z = 0.845) = 20.91 ± 2.86, fσ8 (z = 0.845) = 0.30 ± 0.08. Combined with BAO measurements including those from the eBOSS DR16 QSO and Lyman-α sample, our measurement has raised the significance level of a non-zero ωΛ to ∼11σ. The data product of this work is publicly available at https://github.com/icosmology/eBOSS_DR16_LRGxELG and https://www.sdss.org/science/final-bao-and-rsd-measurements/.
UR - https://www.scopus.com/pages/publications/85107917347
UR - https://www.scopus.com/pages/publications/85107917347#tab=citedBy
U2 - 10.1093/mnras/stab849
DO - 10.1093/mnras/stab849
M3 - Article
AN - SCOPUS:85107917347
SN - 0035-8711
VL - 504
SP - 33
EP - 52
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 1
ER -