A new analysis of galaxy 2-point functions in the BOSS survey, including full-shape information and post-reconstruction BAO

Chen, Shi-Fan; Vlah, Zvonimir; White, Martin (2022) A new analysis of galaxy 2-point functions in the BOSS survey, including full-shape information and post-reconstruction BAO. Journal of Cosmology and Astroparticle Physics, 2022 (02). ISSN 1475-7516

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Abstract

We present a new method for consistent, joint analysis of the pre-and post reconstruction galaxy two-point functions of the BOSS survey. The post-reconstruction correlation function is used to accurately measure the distance-redshift relation and expansion history, while the pre-reconstruction power spectrum multipoles constrain the broad-band shape and the rate-of-growth of large-scale structure. Our technique uses Lagrangian perturbation theory to self-consistently work at the level of two-point functions, i.e. directly with the measured data, without approximating the constraints with summary statistics normalized by the drag scale. Combining galaxies across the full redshift range and both hemispheres we constrain Omega(m) = 0.303 +/- 0.0082, H-0 = 69.23 +/- 0.77 and sigma(8) = 0.733 +/- 0.047 within the context of ACDM. These constraints are consistent both with the Planck primary CMB anisotropy data and recent cosmic shear surveys.

Item Type:	Article
Additional Information:	Preprint under the Creative Commons Attribution license taken from arxiv.org
Uncontrolled Keywords:	Power Spectrum; Large Scale Structure
Subjects:	NATURAL SCIENCES > Physics
Divisions:	Theoretical Physics Division
Depositing User:	Lorena Palameta
Date Deposited:	19 Mar 2026 15:20
URI:	http://fulir.irb.hr/id/eprint/11387
DOI:	10.1088/1475-7516/2022/02/008

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