发表机构
University of Chicago; Stanford University; Argonne National Laboratory; Fermi National Accelerator Laboratory（芝加哥大学; 斯坦福大学; 阿贡国家实验室; 费米国家加速器实验室）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
利用SPT-3G五年数据，以12.8σ显著性测量tSZ选择星系团的空间成团性，约束晕偏置和质量-可观测关系，并展示与丰度测量的协同作用。
AI 中文摘要
我们展示了通过热Sunyaev-Zel'dovich（tSZ）信号选择的星系团空间成团性的测量结果。利用来自SPT-3G主巡天五年数据得到的星系团目录，我们定义了一个跨越$0.25 < z < 1.1$的样本，以及两个分别跨越$0.25 < z < 0.67$和$0.67 < z < 1.1$的子样本。我们以$12.8\sigma$的显著性探测到星系团成团性，这是迄今为止在tSZ选择样本中最高显著性的探测。我们详细介绍了我们的解析建模和理论协方差模型，包括在由数值模拟生成的合成数据上进行的验证。测量和推断通过了各种零检验，并且对影响光学成团性测量的常见空间变化系统效应（如深度、恒星密度和消光）表现出最小的敏感性。我们使用我们的流程对样本的晕偏置$b_{\rm{h}} = 5.30\pm{0.24}$和质量-可观测关系归一化$\rm{lnA}_{sz} = 0.43^{+0.17}_{-0.21}$施加约束。我们还展示了星系团成团性与丰度测量之间的有用协同作用，这体现在高维参数简并的打破上。相对于传统星系数据集，使用tSZ效应选择的星系团样本作为成团性的独特探针，对常见系统效应不敏感，并且该测量的探测显著性将随着SPT-3G Ext-10k巡天的现有数据和SPT-3G+及Simons Observatory的即将到来的数据而大幅增加。
英文摘要
We present a measurement of the spatial clustering of galaxy clusters selected via the thermal Sunyaev-Zel'dovich (tSZ) signal. Using a cluster catalog derived from five years of SPT-3G Main field survey data, we define a sample spanning $0.25 < z < 1.1$, as well as two subsamples spanning $0.25 < z < 0.67$ and $0.67 < z < 1.1$. We detect cluster clustering at $12.8σ$, the highest significance detection in a tSZ-selected sample to date. We detail our analytic modeling and theoretical covariance models, including validations performed on synthetic data created from numerical simulations. The measurements and inference pass a variety of null tests, and show minimal sensitivity to common spatially varying systematics that impact optical clustering measurements, such as depth, stellar density, and extinction. We use our pipeline to place constraints on the halo bias of our sample, $b_{\rm{h}} = 5.30\pm{0.24}$, and the normalization of our mass-observable relation, $\rm{lnA}_{sz} = 0.43^{+0.17}_{-0.21}$. We also demonstrate the useful synergies between cluster clustering and abundance measurements, which manifest in the breaking of high-dimensional parameter degeneracies. Samples of clusters selected using the tSZ effect serve as a unique probe of clustering that is insensitive to common systematics, relative to conventional galaxy datasets, and the detection significance of this measurement will increase substantially with existing data from the SPT-3G Ext-10k survey and upcoming data from SPT-3G+ and the Simons Observatory.
Comments25 pages, 13 figures, submitted to Physical Review D
