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- W4381573040 abstract "We present refined cosmological parameter constraints derived from a cosmic shear analysis of the fourth data release from the Kilo-Degree Survey (KiDS-1000). Our refinements are driven by enhanced galaxy shape measurements using an updated version of the textit{lens}fit code, and improved shear calibration achieved with a newly developed suite of multi-band image simulations. Additionally, we incorporate recent advancements in cosmological inference from the joint Dark Energy Survey Year 3 and KiDS-1000 cosmic shear analysis. Assuming a spatially flat standard cosmological model, we constrain $S_8equivsigma_8(Omega_{rm m}/0.3)^{0.5} = 0.776_{-0.027-0.003}^{+0.029+0.002}$, where the second set of uncertainties accounts for the systematic uncertainties within the shear calibration. These systematic uncertainties stem from minor deviations from realism in the image simulations and the sensitivity of the shear measurement algorithm to the morphology of the galaxy sample. Despite these changes, our results align with previous KiDS studies and other weak lensing surveys, and find a ${sim}2.3sigma$ level of tension with the textit{Planck} cosmic microwave background constraints on $S_8$." @default.
- W4381573040 created "2023-06-22" @default.
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- W4381573040 date "2023-06-19" @default.
- W4381573040 modified "2023-09-26" @default.
- W4381573040 title "KiDS-1000: Cosmology with improved cosmic shear measurements" @default.
- W4381573040 doi "https://doi.org/10.48550/arxiv.2306.11124" @default.
- W4381573040 hasPublicationYear "2023" @default.
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