Cosmology from large-scale structure Constraining ΛCDM with BOSS

被引:117
|
作者
Troster, Tilman [1 ]
Sanchez, Ariel G. [2 ]
Asgari, Marika [1 ]
Blake, Chris [3 ]
Crocce, Martin [4 ]
Heymans, Catherine [1 ,5 ]
Hildebrandt, Hendrik [5 ]
Joachimi, Benjamin [6 ]
Joudaki, Shahab [7 ]
Kannawadi, Arun [8 ]
Lin, Chieh-An [1 ]
Wright, Angus [5 ]
机构
[1] Univ Edinburgh, Inst Astron, Royal Observ, Blackford Hill, Edinburgh EH9 3HJ, Midlothian, Scotland
[2] Max Planck Inst Extraterr Phys, Postfach 1312,Giessenbachstr, D-85741 Garching, Germany
[3] Swinburne Univ Technol, Ctr Astrophys & Supercomp, POB 218, Hawthorn, Vic 3122, Australia
[4] CSIC, Inst Ciences Espai, IEEC, Campus UAB,Carrer Can Magrans S-N, Barcelona 08193, Spain
[5] Ruhr Univ Bochum, Astronom Inst, German Ctr Cosmol Lensing, Univ Str 150, D-44801 Bochum, Germany
[6] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England
[7] Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England
[8] Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden, Netherlands
基金
欧盟地平线“2020”; 美国安德鲁·梅隆基金会; 美国国家科学基金会; 欧洲研究理事会;
关键词
large-scale structure of Universe; cosmological parameters; COVARIANCE MATRICES; GALAXIES; EVOLUTION; CATALOGS;
D O I
10.1051/0004-6361/201936772
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We reanalyse the anisotropic galaxy clustering measurement from the Baryon Oscillation Spectroscopic Survey (BOSS), demonstrating that using the full shape information provides cosmological constraints that are comparable to other low-redshift probes. We find Omega(m) = 0.317(-0.019)(+0.015), sigma(8) = 0.710 +/- 0.049, and h = 0.704 +/- 0.024 for flat Lambda CDM cosmologies using uninformative priors on Omega(c)h(2), 100 theta(MC), ln10(10)A(s) and n(s), and a prior on Omega(b)h(2) that is much wider than current constraints. We quantify the agreement between the Planck 2018 constraints from the cosmic microwave background and BOSS, finding the two data sets to be consistent within a flat Lambda CDM cosmology using the Bayes factor as well as the prior-insensitive suspiciousness statistic. Combining two low-redshift probes, we jointly analyse the clustering of BOSS galaxies with weak lensing measurements from the Kilo-Degree Survey (KV450). The combination of BOSS and KV450 improves the measurement by up to 45%, constraining sigma(8) = 0.702 +/- 0.029 and S-8 = sigma(8 )root Omega(m)/0.3 = 0.728 +/- 0.026. Over the full 5D parameter space, the odds in favour of a single cosmology describing galaxy clustering, lensing, and the cosmic microwave background are 7 +/- 2. The suspiciousness statistic signals a 2.1 +/- 0.3 sigma tension between the combined low redshift probes and measurements from the cosmic microwave background.
引用
收藏
页数:9
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