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
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
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DOI：
10.1093/mnras/staa2800
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发表时间：
2021-01-01
影响因子：
4.8
通讯作者：
Wang, Yuting
中科院分区：
文献类型：
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作者：
Bautista, Julian E.;Paviot, Romain;Wang, Yuting
利用已完成的Sloan数字巡天IV扩展重子振荡光谱巡天（eBOSS）数据Release 16星系样本，对组态空间各向异性成团进行了宇宙学分析.这个样本由红移范围为0.6< z< 1的发光红星系（LRGs）组成，有效红移为z（eff = 0.698）。它结合了174 816 eBOSS和202 642 BOSS LRG。我们提取和模型的重子声振荡（BAO）和红移空间畸变（RSD）的星系两点相关函数的功能，推断几何和动力学的宇宙学约束。所采用的方法进行了广泛的测试一组现实的模拟。从BAO和全形状相关函数分析推断的参数之间的相关性进行了估计。这使我们能够推导出三个宇宙学参数组合的联合约束：D-M（z）/r（d），D-H（z）/r（d）和f sigma（8）（z），其中DM是同向运动的角直径距离，D-H是哈勃距离，r（d）是同向运动的BAO尺度，f是结构的线性增长率，sigma（8）是线性物质扰动的幅度。在将结果与Gil-Marin等人的并行功率谱分析结果相结合后，我们得到约束条件：D-M/r（d）= 17.65 +/-0.30，D-H/r（d）= 19.77 +/-0.47，以及f σ（δ）= 0.473 +/-0.044。这些测量结果与具有标准重力的平坦Lambda冷暗物质模型一致。
We present the cosmological analysis of the configuration-space anisotropic clustering in the completed Sloan Digital Sky Survey IV extended Baryon Oscillation Spectroscopic Survey (eBOSS) Data Release 16 galaxy sample. This sample consists of luminous red galaxies (LRGs) spanning the redshift range 0.6< z< 1, at an effective redshift of z(eff = 0.698.) It combines 174 816 eBOSS and 202 642 BOSS LRGs. We extract and model the baryon acoustic oscillation (BAO) and redshift-space distortion (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 f sigma(8)(z), where DM is the comoving angular diameter distance, D-H is the Hubble distance, r(d) is the comoving BAO scale, f is the linear growth rate of structure, and sigma(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., we obtain the constraints: D-M/r(d) = 17.65 +/- 0.30, D-H/r(d) = 19.77 +/- 0.47, and f sigma(8) = 0.473 +/- 0.044. These measurements are consistent with a flat Lambda cold dark matter model with standard gravity.