Cosmological constraints from the SDSS luminous red galaxies
Cosmological constraints from the SDSS luminous red galaxies
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DOI：
10.1103/physrevd.74.123507
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发表时间：
2006-08
影响因子：
5
通讯作者：
Max Tegmark;D. Eisenstein;M. Strauss;D. Weinberg;M. Blanton;J. Frieman;M. Fukugita;J. Gunn
中科院分区：
文献类型：
--
作者：
Max Tegmark;D. Eisenstein;M. Strauss;D. Weinberg;M. Blanton;J. Frieman;M. Fukugita;J. Gunn
我们使用斯隆数字巡天（SDSS）中的发光红星系（LRGs）测量大尺度实空间功率谱P(k)，并使用该测量来强化威尔金森微波各向异性探测器（WMAP）对宇宙学参数的约束。我们采用基于矩阵的功率谱估计方法，使用伪karhunen - loeve特征模态，在20 k波段内对聚类功率及其各向异性产生不相关的最小方差测量，由于红移空间畸变，在0.01h/Mpc 0.1h/Mpc范围内具有窄且性能良好的窗函数和相关的非线性复杂性，但与更积极的发表分析一致，其中非线性建模至关重要。
We measure the large-scale real-space power spectrum P(k) using luminous red galaxies (LRGs) in the Sloan Digital Sky Survey (SDSS) and use this measurement to sharpen constraints on cosmological parameters from the Wilkinson Microwave Anisotropy Probe (WMAP). We employ a matrix-based power spectrum estimation method using Pseudo-Karhunen-Loeve eigenmodes, producing uncorrelated minimum-variance measurements in 20 k-bands of both the clustering power and its anisotropy due to redshift-space distortions, with narrow and well-behaved window functions in the range 0.01h/Mpc 0.1h/Mpc and associated nonlinear complications, yet agree well with more aggressive published analyses where nonlinear modeling is crucial.