Consistent lensing and clustering in a low-S8 Universe with BOSS, DES Year 3, HSC Year 1, and KiDS-1000

Amon, A; Robertson, N C; Miyatake, † H; Heymans, C; White, M; Derose, J; Yuan, S; Wechsler, R H; Varga, T N; Bocquet, S; Dvornik, A; More, S; Ross, A J; Hoekstra, H; Alarcon, A; Asgari, M; Blazek, J; Campos, A; Chen, R; Choi, A; Crocce, M; Diehl, H T; Doux, C; Eckert, K; Elvin-Poole, J; Everett, S; Ferté, A; Gatti, M; Giannini, G; Gruen, D; Gruendl, R A; Hartley, W G; Herner, K; Hildebrandt, H; Wright, A H; Yin, B; Aguena, M; Allam, S; Annis, J; Bacon, D; Bilicki, M; Brooks, D; Burke, D L; Mohr, J J; Morgan, R; Muir, J; Paz-Chinchón, F; Pieres, A; Malagón, A A Plazas; Porredon, A; Rodriguez-Monroy, M; Roodman, A; Sanchez, E; Serrano, S; Shan, H; Suchyta, E; Swanson, M E C; Tarle, G; Thomas, D; To, C; Zhang, Y

Abstract

We evaluate the consistency between lensing and clustering based on measurements from BOSS combined with galaxy-galaxy lensing from DES-Y3, HSC-Y1, KiDS-1000. We find good agreement between these lensing datasets. We model the observations using the Dark Emulator and fit the data at two fixed cosmologies: Planck (S 8 = 0.83), and a Lensing cosmology (S 8 = 0.76). For a joint analysis limited to large scales, we find that both cosmologies provide an acceptable fit to the data. Full utilisation of the higher signal-to-noise small-scale measurements is hindered by uncertainty in the impact of baryon feedback and assembly bias, which we account for with a reasoned theoretical error budget. We incorporate a systematic inconsistency parameter for each redshift bin, A, that decouples the lensing and clustering. With a wide range of scales, we find different results for the consistency between the two cosmologies. Limiting the analysis to the bins for which the impact of the lens sample selection is expected to be minimal, for the Lensing cosmology, the measurements are consistent with A=1; A = 0.91 ± 0.04 (A = 0.97 ± 0.06) using DES+KiDS (HSC). For the Planck case, we find a discrepancy: A = 0.79 ± 0.03 (A = 0.84 ± 0.05) using DES+KiDS (HSC). We demonstrate that a kSZ-based estimate for baryonic effects alleviates some of the discrepancy in the Planck cosmology. This analysis demonstrates the statistical power of small-scale measurements, but caution is still warranted given modelling uncertainties and foreground sample selection effects.

Citation

Amon, A., Robertson, N. C., Miyatake, †. H., Heymans, C., White, M., Derose, J., …Zhang, Y. (2023). Consistent lensing and clustering in a low-S8 Universe with BOSS, DES Year 3, HSC Year 1, and KiDS-1000. Monthly notices of the Royal Astronomical Society, 518(1), 477-503. https://doi.org/10.1093/mnras/stac2938

• Journal Article Type: Article
• Acceptance Date: Oct 7, 2022
• Online Publication Date: Oct 16, 2022
• Publication Date: 2023-01
• Deposit Date: Dec 9, 2022
• Publicly Available Date: Dec 15, 2022
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 518
• Issue: 1
• Pages: 477-503
• DOI: https://doi.org/10.1093/mnras/stac2938
• Keywords: Gravitational lensing: weak; Large-scale structure of Universe; Cosmology: observations
• Public URL: https://hull-repository.worktribe.com/output/4140370