论文标题

完整的SDSS-IV扩展BARYON振荡光谱调查:从各向异性相关函数0.6和1之间从各向异性相关函数中测量BAO的测量和生长速率

The Completed SDSS-IV extended Baryon Oscillation Spectroscopic Survey: measurement of the BAO and growth rate of structure of the luminous red galaxy sample from the anisotropic correlation function between redshifts 0.6 and 1

论文作者

Bautista, Julian E., Paviot, Romain, Magaña, Mariana Vargas, de la Torre, Sylvain, Fromenteau, Sebastien, Gil-Marín, Hector, Ross, Ashley J., Burtin, Etienne, Dawson, Kyle S., Hou, Jiamin, Kneib, Jean-Paul, de Mattia, Arnaud, Percival, Will J., Rossi, Graziano, Tojeiro, Rita, Zhao, Cheng, Zhao, Gong-Bo, Alam, Shadab, Brownstein, Joel, Chapman, Michael J., Choi, Peter D., Chuang, Chia-Hsun, Escoffier, Stéphanie, de la Macorra, Axel, Bourboux, Hélion du Mas des, Mohammad, Faizan G., Moon, Jeongin, Müller, Eva-Maria, Nadathur, Seshadri, Newman, Jeffrey A., Schneider, Donald, Seo, Hee-Jong, Wang, Yuting

论文摘要

我们介绍了完整的Sloan数字天空调查IV(SDSS-IV)扩展BARYON振荡光谱调查(EBOSS)DR16 GAR16 GALAXY样品中的构型各向异性聚类的宇宙学分析。该样本由跨越红移范围$ 0.6 <z <1 $的发光红星系(LRGS)组成,在有效的$ z _ {\ rm eff} = 0.698 $的有效红移。它结合了174 816 EBOSS LRGS和202 642 BOSS CMASS星系。我们从银河系的两点相关函数中提取和建模Baryon声学振荡(BAO)和红移空间畸变(RSD)特征,以推断几何和动态宇宙学的约束。通过一组逼真的模拟对所采用的方法进行了广泛的测试。估计了来自BAO的推论参数与全形相关函数分析之间的相关性。 This allows us to derive joint constraints on the three cosmological parameter combinations: $D_M(z)/r_d$, $D_H(z)/r_d$ and $fσ_8(z)$, where $D_M$ is the comoving angular diameter distance, $D_H$ is Hubble distance, $r_d$ is the comoving BAO scale, $f$ is the linear growth rate of structure, and $σ_8$是线性物质扰动的幅度。将结果与Gil-Marin等人的平行功率谱分析的结果相结合后。 2020,我们获得约束:$ d_m/r_d = 17.65 \ pm 0.30 $,$ d_h/r_d = 19.77 \ pm 0.47 $,$fσ_8= 0.473 \ pm 0.044 $。这些测量值与具有标准重力的平面$λ$ CDM模型一致。

We present the cosmological analysis of the configuration-space anisotropic clustering in the completed Sloan Digital Sky Survey IV (SDSS-IV) extended Baryon Oscillation Spectroscopic Survey (eBOSS) DR16 galaxy sample. This sample consists of luminous red galaxies (LRGs) spanning the redshift range $0.6 < z < 1$, at an effective redshift of $z_{\rm eff}=0.698$. It combines 174 816 eBOSS LRGs and 202 642 BOSS CMASS galaxies. We extract and model the baryon acoustic oscillations (BAO) and redshift-space distortions (RSD) features from the galaxy two-point correlation function to infer geometrical and dynamical cosmological constraints. The adopted methodology is extensively tested on a set of realistic simulations. The correlations between the inferred parameters from the BAO and full-shape correlation function analyses are estimated. This allows us to derive joint constraints on the three cosmological parameter combinations: $D_M(z)/r_d$, $D_H(z)/r_d$ and $fσ_8(z)$, where $D_M$ is the comoving angular diameter distance, $D_H$ is Hubble distance, $r_d$ is the comoving BAO scale, $f$ is the linear growth rate of structure, and $σ_8$ is the amplitude of linear matter perturbations. After combining the results with those from the parallel power spectrum analysis of Gil-Marin et al. 2020, we obtain the constraints: $D_M/r_d = 17.65 \pm 0.30$, $D_H/r_d = 19.77 \pm 0.47$, $fσ_8 = 0.473 \pm 0.044$. These measurements are consistent with a flat $Λ$CDM model with standard gravity.

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