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Efficient cosmological analysis of the SDSS/BOSS data from the Effective Field Theory of Large-Scale Structure
Journal of Cosmology and Astroparticle Physics ( IF 6.4 ) Pub Date : 2020-06-01 , DOI: 10.1088/1475-7516/2020/06/001
Thomas Colas 1, 2 , Guido d'Amico 1, 3 , Leonardo Senatore 1, 2 , Pierre Zhang 4, 5, 6 , Florian Beutler 7
Affiliation  

The precision of the cosmological data allows us to accurately approximate the predictions for cosmological observables by Taylor expanding up to a low order the dependence on the cosmological parameters around a reference cosmology. By applying this observation to the redshift-space one-loop galaxy power spectrum of the Effective Field Theory of Large-Scale Structure, we analyze the BOSS DR12 data by scanning over all the parameters of ΛCDM cosmology with massive neutrinos. We impose several sets of priors, the widest of which is a Big Bang Nucleosynthesis prior on the current fractional energy density of baryons, Ωbh, and a 20% flat prior on ns. In this case we measure the primordial amplitude of the power spectrum, As, the abundance of matter, Ωm, and the Hubble parameter, H0, to about 15%, 5.0% and 1.9% respectively, obtaining ln(10As) = 2.87 ± 0.15, Ωm = 0.316± 0.016, H0 = 69.0± 1.3 km/(s Mpc) at 68% confidence level. A public code is released with this preprint. 1 ar X iv :1 90 9. 07 95 1v 1 [ as tr oph .C O ] 1 7 Se p 20 19

中文翻译:

来自大尺度结构有效场理论的SDSS/BOSS数据的高效宇宙学分析

宇宙学数据的精确性使我们能够准确地近似泰勒将参考宇宙学周围的宇宙学参数的依赖性扩展到低阶对宇宙学可观测量的预测。通过将这一观察应用于大尺度结构有效场论的红移空间单环星系功率谱,我们通过扫描具有大量中微子的 ΛCDM 宇宙学的所有参数来分析 BOSS DR12 数据。我们施加了几组先验,其中最广泛的是重子当前分数能量密度 Ωbh 上的大爆炸核合成先验,以及 ns 上的 20% 平坦先验。在这种情况下,我们分别测量功率谱的原始振幅 As、物质丰度 Ωm 和哈勃参数 H0 分别约为 15%、5.0% 和 1.9%,得到 ln(10As) = 2。87 ± 0.15, Ωm = 0.316± 0.016, H0 = 69.0± 1.3 km/(s Mpc) 在 68% 置信水平下。公开代码随此预印本一起发布。1 ar X iv :1 90 9. 07 95 1v 1 [as troph .CO] 1 7 Sep 20 19
更新日期:2020-06-01
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