KiDS-SBI: Simulation-based inference analysis of KiDS-1000 cosmic shear

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Volume 694 (February 2025)

A&A, 694 (2025) A223

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Table E.1.

Main inferred cosmological and astrophysical parameters from mocks generated with the anisotropic systematics model.

Parameter	Mock truth	Marginal ±1σ	MAP ± PJ-HPD
S₈	0.756	$0 . 752_{- 0.029}^{+ 0.034}$ $0.752^{+0.034}_{-0.029}$	$0 . 752_{- 0.031}^{+ 0.029}$ $0.752^{+0.029}_{-0.031}$
σ₈	0.706	$0 . 720_{- 0.19}^{+ 0.093}$ $0.720^{+0.093}_{-0.19}$	$0 . 613_{- 0.190}^{+ 0.096}$ $0.613^{+0.096}_{-0.190}$
Ω_m	0.344	$0 . 36_{- 0.14}^{+ 0.10}$ $0.36^{+0.10}_{-0.14}$	$0 . 451_{- 0.140}^{+ 0.168}$ $0.451^{+0.168}_{-0.140}$
h₀	0.657	< 0.747	$0 . 672_{- 0.078}^{+ 0.023}$ $0.672^{+0.023}_{-0.078}$
ω_c	0.292	$0 . 162_{- 0.048}^{+ 0.075}$ $0.162^{+0.075}_{-0.048}$	$0 . 182_{- 0.057}^{+ 0.060}$ $0.182^{+0.060}_{-0.057}$
ω_b	0.022	—	$0 . 022_{- 0.002}^{+ 0.002}$ $0.022^{+0.002}_{-0.002}$
n_s	1.0	< 0.981	$0 . 911_{- 0.067}^{+ 0.071}$ $0.911^{+0.071}_{-0.067}$
A_IA	0.396	$0 . 11_{- 0.31}^{+ 0.48}$ $0.11^{+0.48}_{-0.31}$	$0 . 266_{- 0.322}^{+ 0.068}$ $0.266^{+0.068}_{-0.322}$
A_bary	3.133	—	$2 . 351_{- 0.250}^{+ 0.114}$ $2.351^{+0.114}_{-0.250}$

Notes. For each parameter, we show the underlying true value which was input into the mock data vector, and the inferred value recovered by KiDS-SBI. The third column shows the marginal means as well as the upper and lower 68% confidence intervals, i.e. 1σ, of the marginals. h₀, n_s, ω_b, and A_bary are not well enough constrained in order to calculate a meaningful marginal parameter estimate. The fourth column shows the maximum a posteriori (MAP), and the uncertainties are defined as the upper and lower 68% confidence intervals, i.e. 1σ, given by the projected joint highest posterior density, PJ-HPD (Robert 2007; Joachimi et al. 2021). Note: cosmic shear is only expected to significantly constrain the value of S₈ and A_IA.

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