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

被引:103
|
作者
Chen, Shi-Fan [1 ]
Vlah, Zvonimir [2 ,3 ,4 ]
White, Martin [1 ]
机构
[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[2] Univ Cambridge, Kavli Inst Cosmol, Cambridge CB3 0HA, England
[3] Univ Cambridge, Dept Appl Math & Theoret Phys, Cambridge CB3 0HA, England
[4] Rudjer Boskovic Inst, Div Theoret Phys, Bijenicka 54, HR-10000 Zagreb, Croatia
关键词
baryon acoustic oscillations; cosmological parameters from LSS; redshift surveys; BARYON ACOUSTIC-OSCILLATIONS; POWER-SPECTRUM; THEORETICAL SYSTEMATICS; PERTURBATION; SCALE; RECONSTRUCTION; APPROXIMATION; EVOLUTION; DISTANCE; PLANE;
D O I
10.1088/1475-7516/2022/02/008
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
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.
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页数:34
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