The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: Cosmological Implications from two Decades of Spectroscopic Surveys at the Apache Point observatory
Creators: name: EBOSS Collaboration
name: Alam, Shadab
name: Aubert, Marie
name: Avila, Santiago
name: Balland, Christophe
name: Bautista, Julian E.
name: Bershady, Matthew A.
name: Bizyaev, Dmitry
name: Blanton, Michael R.
name: Bolton, Adam S.
name: Bovy, Jo
name: Brinkmann, Jonathan
name: Brownstein, Joel R.
name: Burtin, Etienne
name: Chabanier, Solene
name: Chapman, Michael J.
name: Choi, Peter Doohyun
name: Chuang, Chia-Hsun
name: Comparat, Johan
name: Cuceu, Andrei
name: Dawson, Kyle S.
name: de la Macorra, Axel
name: de la Torre, Sylvain
name: de Mattia, Arnaud
name: Agathe, Victoria de Sainte
name: Bourboux, Hélion du Mas des
name: Escoffier, Stephanie
name: Etourneau, Thomas
name: Farr, James
name: Font-Ribera, Andreu
name: Frinchaboy, Peter M.
name: Fromenteau, Sebastien
name: Gil-Marín, Héctor
name: Gonzalez-Morales, Alma X.
name: Gonzalez-Perez, Violeta
name: Grabowski, Kathleen
name: Guy, Julien
name: Hawken, Adam J.
name: Hou, Jiamin
name: Kong, Hui
name: Klaene, Mark
name: Kneib, Jean-Paul
name: Goff, Jean-Marc Le
name: Lin, Sicheng
name: Long, Daniel
name: Lyke, Brad W.
name: Cousinou, Marie-Claude
name: Martini, Paul
name: Masters, Karen
name: Mohammad, Faizan G.
name: Moon, Jeongin
name: Mueller, Eva-Maria
name: Munõz-Gutieŕrez, Andrea
name: Myers, Adam D.
name: Nadathur, Seshadri
name: Neveux, Richard
name: Newman, Jeffrey A.
name: Noterdaeme, Pasquier
name: Oravetz, Audrey
name: Oravetz, Daniel
name: Palanque-Delabrouille, Nathalie
name: Pan, Kaike
name: Parker, James
name: Paviot, Romain
name: Percival, Will J.
name: Peŕez-Rafols, Ignasi
name: Petitjean, Patrick
name: Pieri, Matthew M.
name: Prakash, Abhishek
name: Raichoor, Anand
name: Ravoux, Corentin
name: Rezaie, Mehdi
name: Rich, James
name: Ross, Ashley J.
name: Rossi, Graziano
name: Ruggeri, Rossana
name: Ruhlmann-Kleider, Vanina
name: Sańchez, Ariel G.
name: Sańchez, F. Javier
name: Sańchez-Gallego, José R.
name: Sayres, Conor
name: Schneider, Donald P.
name: Seo, Hee-Jong
name: Shafieloo, Arman
name: Slosar, Anže
name: Smith, Alex
name: Stermer, Julianna
name: Tamone, Amelie
name: Tinker, Jeremy L.
name: Tojeiro, Rita
name: Vargas-Magaña, Mariana
name: Variu, Andrei
name: Wang, Yuting
name: Weaver, Benjamin A.
name: Weijmans, Anne-Marie
name: Yeche, Christophe
name: Zarrouk, Pauline
name: Zhao, Cheng
name: Zhao, Gong-Bo
name: Zheng, Zheng
Publisher: name: arXiv
Year: 2020
Subjects: subject: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We present the cosmological implications from final measurements of clustering using galaxies, quasars, and Ly$α$ forests from the completed Sloan Digital Sky Survey (SDSS) lineage of experiments in large-scale structure. These experiments, composed of data from SDSS, SDSS-II, BOSS, and eBOSS, offer independent measurements of baryon acoustic oscillation (BAO) measurements of angular-diameter distances and Hubble distances relative to the sound horizon, $r_d$, from eight different samples and six measurements of the growth rate parameter, $fσ_8$, from redshift-space distortions (RSD). This composite sample is the most constraining of its kind and allows us to perform a comprehensive assessment of the cosmological model after two decades of dedicated spectroscopic observation. We show that the BAO data alone are able to rule out dark-energy-free models at more than eight standard deviations in an extension to the flat, $Λ$CDM model that allows for curvature. When combined with Planck Cosmic Microwave Background (CMB) measurements of temperature and polarization the BAO data provide nearly an order of magnitude improvement on curvature constraints. The RSD measurements indicate a growth rate that is consistent with predictions from Planck primary data and with General Relativity. When combining the results of SDSS BAO and RSD with external data, all multiple-parameter extensions remain consistent with a $Λ$CDM model. Regardless of cosmological model, the precision on $Ω_Λ$, $H_0$, and $σ_8$, remains at roughly 1\%, showing changes of less than 0.6\% in the central values between models. The inverse distance ladder measurement under a o$w_0w_a$CDM yields $H_0= 68.20 \pm 0.81 \, \rm km\, s^{-1} Mpc^{-1}$, remaining in tension with several direct determination methods. (abridged)
description: A summary of all SDSS BAO and RSD measurements with accompanying legacy figures can be found here: https://www.sdss.org/science/final-bao-and-rsd-measurements/ . The full cosmological interpretation of these measurements can be found here: https://www.sdss.org/science/cosmology-results-from-eboss/