论文标题
儿童+Viking-450：宇宙剪切断层扫描的内部一致性测试，基于颜色的源星系拆分
KiDS+VIKING-450: An internal-consistency test for cosmic shear tomography with a colour-based split of source galaxies
论文作者
论文摘要
我们对儿童+Viking-450（KV450）宇宙剪切分析进行了内部一致性测试，并通过基于颜色的源星系拆分。利用两个子样本的相同测量和校准，我们检查了剪切测量的特征和校准管道的性能。在建模方面，我们使用具有专用测试参数的贝叶斯分析检查了观察力滋扰参数，特别是用于红移校准和内在比对的观察力滋扰参数。我们验证了当前的滋扰参数足以使KV450数据捕获残留系统，并且在第二个和第三个红移断层扫描中看到了轻微的偏差。我们的测试还展示了固有比对的推断幅度与低红移断层扫描箱中的红移不确定性之间的变性。该测试对背景宇宙学不敏感，因此可以在进行任何宇宙学推断之前实施。
We performed an internal-consistency test of the KiDS+VIKING-450 (KV450) cosmic shear analysis with a colour-based split of source galaxies. Utilising the same measurements and calibrations for both sub-samples, we inspected the characteristics of the shear measurements and the performance of the calibration pipelines. On the modelling side, we examined the observational nuisance parameters, specifically those for the redshift calibration and intrinsic alignments, using a Bayesian analysis with dedicated test parameters. We verified that the current nuisance parameters are sufficient for the KV450 data to capture residual systematics, with slight deviations seen in the second and the third redshift tomographic bins. Our test also showcases the degeneracy between the inferred amplitude of intrinsic alignments and the redshift uncertainties in low redshift tomographic bins. The test is rather insensitive to the background cosmology and, therefore, can be implemented before any cosmological inference is made.
