期刊
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
卷 471, 期 4, 页码 4412-4435出版社
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx1820
关键词
gravitational lensing: weak; cosmological parameters; cosmology: observations; large-scale structure of Universe
资金
- Netherlands Organization for Scientific Research (NWO) [022.003.013]
- World Premier International Research Center Initiative (WPI), MEXT, Japan
- European Research Council under FP7 [279396, 647112]
- STFC [ST/J004421/1, ST/L00285X/1]
- NWO [614.001.103]
- Emmy Noether grant [Hi 1495/2-1]
- Deutsche Forschungsgemeinschaft [TR33]
- Australian Research Council Centre of Excellence for All-sky Astrophysics (CAASTRO) [CE110001020]
- People Programme (Marie Curie Actions) of the European Union's Seventh Framework Programme (FP7) under REA grant [627288]
- Alexander von Humboldt Foundation
- ESO Telescopes at the La Silla Paranal Observatory [177.A-3016, 177.A-3017, 177.A-3018]
- Science and Technology Facilities Council [ST/J004421/1, ST/N000919/1, ST/H002456/1, ST/L00285X/1] Funding Source: researchfish
- European Research Council (ERC) [647112] Funding Source: European Research Council (ERC)
- STFC [ST/L00285X/1, ST/M001334/1, ST/N000919/1, ST/H002456/1, ST/J004421/1] Funding Source: UKRI
We present measurements of the weak gravitational lensing shear power spectrum based on 450 deg(2) of imaging data from the Kilo Degree Survey. We employ a quadratic estimator in two and three redshift bins and extract band powers of redshift autocorrelation and crosscorrelation spectra in the multipole range 76 <= l <= 1310. The cosmological interpretation of the measured shear power spectra is performed in a Bayesian framework assuming a Lambda CDM model with spatially flat geometry, while accounting for small residual uncertainties in the shear calibration and redshift distributions as well as marginalizing over intrinsic alignments, baryon feedback and an excess- noise power model. Moreover, massive neutrinos are included in the modelling. The cosmological main result is expressed in terms of the parameter combination S8 sigma(8) root Omega (m)/ 0.3 yielding S-8 = 0.651 +/- 0.058 (three z- bins), confirming the recently reported tension in this parameter with constraints from Planck at 3.2s (three z- bins). We cross- check the results of the three z- bin analysis with the weaker constraints from the two z- bin analysis and find them to be consistent. The high- level data products of this analysis, such as the band power measurements, covariance matrices, redshift distributions and likelihood evaluation chains
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