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arXiv 2301.08692astro-ph.CO
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BOSS中红移空间成团和星系-星系透镜的全尺度和全形状分析对$S_8$的限制

Constraints on $S_8$ from a full-scale and full-shape analysis of redshift-space clustering and galaxy-galaxy lensing in BOSS

Johannes U. Lange, Andrew P. Hearin, Alexie Leauthaud, Frank C. van den Bosch, Enia Xhakaj, Hong Guo, Risa H. Wechsler, Joseph DeRose

摘要:

我们提出了一个新的基于模拟的星系星系透镜和星系红移空间集群的宇宙学分析。与基于微扰理论的分析方法相比,我们基于模拟的方法使我们能够探测更宽范围的尺度,$0.4 \, h^{-1} \, \mathrm{Mpc}$到$63 \, h^{-1} \, \mathrm{Mpc}$,包括高度非线性尺度,并边缘化天体物理效应,如装配偏差。我们应用这个框架的重子振荡光谱调查LOWZ样本交叉相关的国家的最先进的引力透镜目录从千度调查和暗能量调查的数据。我们表明,引力透镜和红移空间聚类分析时,在很大范围内的尺度上的生长结构参数$S_8 = σ_8 \sqrt{Ω_{\rm m} / 0.3}$的严格限制。总的来说,我们推断$S_8 = 0.792 \pm 0.022$时,分析组合的星系星系透镜和投影星系集群和$S_8 = 0.771 \pm 0.027$星系红移空间集群。这些研究结果突出了全面研究对仅分析大规模研究的潜在约束力,并展示了联合分析多个大规模结构调查的好处。我们对$S_8$的推断值低于从CMB推断的值$S_8 = 0.834 \pm 0.016$。虽然这种差异本身在统计学上并不显著,但我们的结果反映了文献中的其他发现,即低红移大尺度结构探针推断出$S_8$的值低于CMB,即所谓的$S_8$ -张力。

英文摘要:

We present a novel simulation-based cosmological analysis of galaxy-galaxy lensing and galaxy redshift-space clustering. Compared to analysis methods based on perturbation theory, our simulation-based approach allows us to probe a much wider range of scales, $0.4 \, h^{-1} \, \mathrm{Mpc}$ to $63 \, h^{-1} \, \mathrm{Mpc}$, including highly non-linear scales, and marginalises over astrophysical effects such as assembly bias. We apply this framework to data from the Baryon Oscillation Spectroscopic Survey LOWZ sample cross-correlated with state-of-the-art gravitational lensing catalogues from the Kilo Degree Survey and the Dark Energy Survey. We show that gravitational lensing and redshift-space clustering when analysed over a large range of scales place tight constraints on the growth-of-structure parameter $S_8 = σ_8 \sqrt{Ω_{\rm m} / 0.3}$. Overall, we infer $S_8 = 0.792 \pm 0.022$ when analysing the combination of galaxy-galaxy lensing and projected galaxy clustering and $S_8 = 0.771 \pm 0.027$ for galaxy redshift-space clustering. These findings highlight the potential constraining power of full-scale studies over studies analysing only large scales, and also showcase the benefits of analysing multiple large-scale structure surveys jointly. Our inferred values for $S_8$ fall below the value inferred from the CMB, $S_8 = 0.834 \pm 0.016$. While this difference is not statistically significant by itself, our results mirror other findings in the literature whereby low-redshift large scale structure probes infer lower values for $S_8$ than the CMB, the so-called $S_8$-tension.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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