TY - JOUR
T1 - KiDS-1000 Cosmology
T2 - Multi-probe weak gravitational lensing and spectroscopic galaxy clustering constraints
AU - Heymans, Catherine
AU - Tröster, Tilman
AU - Asgari, Marika
AU - Blake, Chris
AU - Hildebrandt, Hendrik
AU - Joachimi, Benjamin
AU - Kuijken, Konrad
AU - Lin, Chieh An
AU - Sánchez, Ariel G.
AU - Van Den Busch, Jan Luca
AU - Wright, Angus H.
AU - Amon, Alexandra
AU - Bilicki, Maciej
AU - De Jong, Jelte
AU - Crocce, Martin
AU - Dvornik, Andrej
AU - Erben, Thomas
AU - Fortuna, Maria Cristina
AU - Getman, Fedor
AU - Giblin, Benjamin
AU - Glazebrook, Karl
AU - Hoekstra, Henk
AU - Joudaki, Shahab
AU - Kannawadi, Arun
AU - Köhlinger, Fabian
AU - Lidman, Chris
AU - Miller, Lance
AU - Napolitano, Nicola R.
AU - Parkinson, David
AU - Schneider, Peter
AU - Shan, Huanyuan
AU - Valentijn, Edwin A.
AU - Verdoes Kleijn, Gijs
AU - Wolf, Christian
N1 - Publisher Copyright:
© ESO 2021.
PY - 2021/2/1
Y1 - 2021/2/1
N2 - We present a joint cosmological analysis of weak gravitational lensing observations from the Kilo-Degree Survey (KiDS-1000), with redshift-space galaxy clustering observations from the Baryon Oscillation Spectroscopic Survey (BOSS) and galaxy-galaxy lensing observations from the overlap between KiDS-1000, BOSS, and the spectroscopic 2-degree Field Lensing Survey. This combination of large-scale structure probes breaks the degeneracies between cosmological parameters for individual observables, resulting in a constraint on the structure growth parameter S8 = σ8? (ωm/0.3) = 0.766-0.014+0.020, which has the same overall precision as that reported by the full-sky cosmic microwave background observations from Planck. The recovered S8 amplitude is low, however, by 8.3? ±? 2.6% relative to Planck. This result builds from a series of KiDS-1000 analyses where we validate our methodology with variable depth mock galaxy surveys, our lensing calibration with image simulations and null-tests, and our optical-to-near-infrared redshift calibration with multi-band mock catalogues and a spectroscopic-photometric clustering analysis. The systematic uncertainties identified by these analyses are folded through as nuisance parameters in our cosmological analysis. Inspecting the offset between the marginalised posterior distributions, we find that the S8-difference with Planck is driven by a tension in the matter fluctuation amplitude parameter, σ8. We quantify the level of agreement between the cosmic microwave background and our large-scale structure constraints using a series of different metrics, finding differences with a significance ranging between ∼3σ, when considering the offset in S8, and ∼2σ, when considering the full multi-dimensional parameter space.
AB - We present a joint cosmological analysis of weak gravitational lensing observations from the Kilo-Degree Survey (KiDS-1000), with redshift-space galaxy clustering observations from the Baryon Oscillation Spectroscopic Survey (BOSS) and galaxy-galaxy lensing observations from the overlap between KiDS-1000, BOSS, and the spectroscopic 2-degree Field Lensing Survey. This combination of large-scale structure probes breaks the degeneracies between cosmological parameters for individual observables, resulting in a constraint on the structure growth parameter S8 = σ8? (ωm/0.3) = 0.766-0.014+0.020, which has the same overall precision as that reported by the full-sky cosmic microwave background observations from Planck. The recovered S8 amplitude is low, however, by 8.3? ±? 2.6% relative to Planck. This result builds from a series of KiDS-1000 analyses where we validate our methodology with variable depth mock galaxy surveys, our lensing calibration with image simulations and null-tests, and our optical-to-near-infrared redshift calibration with multi-band mock catalogues and a spectroscopic-photometric clustering analysis. The systematic uncertainties identified by these analyses are folded through as nuisance parameters in our cosmological analysis. Inspecting the offset between the marginalised posterior distributions, we find that the S8-difference with Planck is driven by a tension in the matter fluctuation amplitude parameter, σ8. We quantify the level of agreement between the cosmic microwave background and our large-scale structure constraints using a series of different metrics, finding differences with a significance ranging between ∼3σ, when considering the offset in S8, and ∼2σ, when considering the full multi-dimensional parameter space.
KW - Gravitational lensing: weak
KW - Methods: data analysis
KW - Methods: statistical
KW - Surveys
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U2 - 10.1051/0004-6361/202039063
DO - 10.1051/0004-6361/202039063
M3 - Article
AN - SCOPUS:85101257520
SN - 0004-6361
VL - 646
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A140
ER -