Baryon Acoustic Oscillations and the Hubble constant: past, present and future
Baryon Acoustic Oscillations and the Hubble constant: past, present and future
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重子声振荡和哈勃常数：过去、现在和未来
DOI：
10.1088/1475-7516/2019/10/044
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发表时间：
2019
影响因子：
6.4
通讯作者：
Cuceu A
中科院分区：
文献类型：
--
作者：
Cuceu A
我们调查的哈勃常数（H 0）使用重子声振荡（BAO）和重子密度测量大爆炸核合成（BBN）的约束。我们首先调查星系BAO测量和那些使用莱曼-α森林，贝叶斯框架内的紧张关系。使用eBOSS DR 14的最新结果，我们发现，假设平坦的ΛCDM，这种张力是统计的概率是106.3%。我们测得H 0= 67.6±1.1 km s− 1 Mpc− 1，对BBN先验的依赖性较弱，与普朗克宇宙微波背景辐射（CMB）结果一致，并与距离阶梯结果有很强的张力。最后，我们预测了未来的BAO+ BBN测量的H 0，使用暗能量光谱仪（DESI）。我们发现，BBN之前的选择将有显着的影响时，考虑未来的BAO测量DESI。
We investigate constraints on the Hubble constant (H 0) using Baryon Acoustic Oscillations (BAO) and baryon density measurements from Big Bang Nucleosynthesis (BBN). We start by investigating the tension between galaxy BAO measurements and those using the Lyman-α forest, within a Bayesian framework. Using the latest results from eBOSS DR14 we find that the probability of this tension being statistical is≃ 6.3% assuming flat ΛCDM. We measure H 0= 67.6±1.1 km s− 1 Mpc− 1, with a weak dependence on the BBN prior used, in agreement with results from Planck Cosmic Microwave Background (CMB) results and in strong tension with distance ladder results. Finally, we forecast the future of BAO+ BBN measurements of H 0, using the Dark Energy Spectroscopic Instrument (DESI). We find that the choice of BBN prior will have a significant impact when considering future BAO measurements from DESI.