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• W4283311221 endingPage "076" @default.
• W4283311221 startingPage "076" @default.
• W4283311221 abstract "Abstract We analyse the clustering of matter on large scales in an extension of the concordance model that allows for spatial curvature. We develop a consistent approach to curvature and wide-angle effects on the galaxy 2-point correlation function in redshift space. In particular we derive the Alcock-Paczynski distortion of fσ 8 , which differs significantly from empirical models in the literature. A key innovation is the use of the 'Clustering Ratio', which probes clustering in a different way to redshift-space distortions, so that their combination delivers more powerful cosmological constraints. We use this combination to constrain cosmological parameters, without CMB information. In a curved Universe, we find that Ω m, 0 =0.26± 0.04 (68% CL). When the clustering probes are combined with low-redshift background probes — BAO and SNIa — we obtain a CMB-independent constraint on curvature: Ω K , 0 = 0.0041 -0.0504 +0.0500 . We find no Bayesian evidence that the flat concordance model can be rejected. In addition we show that the sound horizon at decoupling is r d = 144.57 ± 2.34 Mpc, in agreement with its measurement from CMB anisotropies. As a consequence, the late-time Universe is compatible with flat ΛCDM and a standard sound horizon, leading to a small value of H 0 , without assuming any CMB information. Clustering Ratio measurements produce the only low-redshift clustering data set that is not in disagreement with the CMB, and combining the two data sets we obtain Ω K , 0 = -0.023 ± 0.010." @default.
• W4283311221 created "2022-06-24" @default.
• W4283311221 creator A5023549137 @default.
• W4283311221 creator A5030653314 @default.
• W4283311221 creator A5032131701 @default.
• W4283311221 creator A5040992023 @default.
• W4283311221 creator A5075132871 @default.
• W4283311221 date "2022-09-01" @default.
• W4283311221 modified "2023-10-16" @default.
• W4283311221 title "Constraining spatial curvature with large-scale structure" @default.
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