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The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic power spectrum between redshifts 0.6 and 1.0

17 Jul 2020arXiv:2007.08994links table onlyarchive 2025-07-28

Héctor Gil-Marín, Julián E. Bautista, Romain Paviot, Mariana Vargas-Magaña, Sylvain de la Torre, Sebastien Fromenteau, Shadab Alam, Santiago Ávila, Etienne Burtin, Chia-Hsun Chuang, Kyle S. Dawson, Jiamin Hou, Arnaud de Mattia, Faizan G. Mohammad, Eva-Maria Müller, Seshadri Nadathur, Richard Neveux, Will J. Percival, Anand Raichoor, Mehdi Rezaie, Ashley J. Ross, Graziano Rossi, Vanina Ruhlmann-Kleider, Alex Smith, Amélie Tamone, Jeremy L. Tinker, Rita Tojeiro, Yuting Wang, Gong-Bo Zhao, Cheng Zhao, Jonathan Brinkmann, Joel R. Brownstein, Peter D. Choi, Stephanie Escoffier, Axel de la Macorra, Jeongin Moon, Jeffrey A. Newman, Donald P. Schneider, Hee-Jong Seo, Mariappan Vivek

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We analyse the clustering of the Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey Data Release 16 luminous red galaxy sample (DR16 eBOSS LRG) in combination with the high redshift tail of the Sloan Digital Sky Survey III Baryon Oscillation Spectroscopic Survey Data Release 12 (DR12 BOSS CMASS). We measure the redshift space distortions (RSD) and also extract the longitudinal and transverse baryonic acoustic oscillation (BAO) scale from the anisotropic power spectrum signal inferred from 377,458 galaxies between redshifts 0.6 and 1.0, with effective redshift of z_(eff)=0.698 and effective comoving volume of 2.72 Gpc³. After applying reconstruction we measure the BAO scale and infer D_H(z_(eff))/r_(drag) = 19.30±0.56 and D_M(z_(eff))/r_(drag) =17.86 ±0.37. When we perform a redshift space distortions analysis on the pre-reconstructed catalogue on the monopole, quadrupole and hexadecapole we find, D_H(z_(eff))/r_(drag) = 20.18±0.78, D_M(z_(eff))/r_(drag) =17.49 ±0.52 and fσ₈(z_(eff))=0.454±0.046. We combine both sets of results along with the measurements in configuration space of \cite{LRG_corr} and report the following consensus values: D_H(z_(eff))/r_(drag) = 19.77±0.47, D_M(z_(eff))/r_(drag) = 17.65±0.30 and fσ₈(z_(eff))=0.473±0.044, which are in full agreement with the standard ΛCDM and GR predictions. These results represent the most precise measurements within the redshift range 0.6≤z ≤1.0 and are the culmination of more than 8 years of SDSS observations.

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