论文标题
Kids-1000宇宙学：宇宙剪切限制和两个点统计之间的比较
KiDS-1000 Cosmology: Cosmic shear constraints and comparison between two point statistics
论文作者
论文摘要
我们从宇宙剪切分析（KIDS-1000）的第四个数据发布中介绍了宇宙学的限制，并用九波段光学和近红外光度法将调查区域翻了一番，相对于以前的儿童分析。 Adopting a spatially flat $Λ$CDM model, we find $S_8 = σ_8 (Ω_{\rm m}/0.3)^{0.5} = 0.759^{+0.024}_{-0.021}$ for our fiducial analysis, which is in $3σ$ tension with the prediction of the Planck Legacy analysis of the cosmic microwave background.我们比较了基准的Cosebis（E/B构成的完整正交集）分析与对两点剪切相关函数和带功率谱的互补分析，发现结果非常一致。我们研究了所有三个统计数据对许多测量，天体物理和建模系统的敏感性，发现我们的$ S_8 $约束是可靠的，并由统计误差主导。我们对数据不同分区的宇宙学分析通过了贝叶斯内部一致性测试，除了第二层层造影箱。由于该垃圾箱包含低红移星系，并带有微不足道的宇宙学信息，因此我们发现我们的结果不变，因为该样品的包含或排除。
We present cosmological constraints from a cosmic shear analysis of the fourth data release of the Kilo-Degree Survey (KiDS-1000), doubling the survey area with nine-band optical and near-infrared photometry with respect to previous KiDS analyses. Adopting a spatially flat $Λ$CDM model, we find $S_8 = σ_8 (Ω_{\rm m}/0.3)^{0.5} = 0.759^{+0.024}_{-0.021}$ for our fiducial analysis, which is in $3σ$ tension with the prediction of the Planck Legacy analysis of the cosmic microwave background. We compare our fiducial COSEBIs (Complete Orthogonal Sets of E/B-Integrals) analysis with complementary analyses of the two-point shear correlation function and band power spectra, finding results to be in excellent agreement. We investigate the sensitivity of all three statistics to a number of measurement, astrophysical, and modelling systematics, finding our $S_8$ constraints to be robust and dominated by statistical errors. Our cosmological analysis of different divisions of the data pass the Bayesian internal consistency tests, with the exception of the second tomographic bin. As this bin encompasses low redshift galaxies, carrying insignificant levels of cosmological information, we find that our results are unchanged by the inclusion or exclusion of this sample.
