Constraints on H0 from WMAP and BAO Measurements
Constraints on H0 from WMAP and BAO Measurements
复制标题
WMAP 和 BAO 测量对 H0 的约束
DOI：
10.1088/0253-6102/71/7/826
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发表时间：
2019
期刊：
影响因子：
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通讯作者：
Qing-Guo Huang
中科院分区：
文献类型：
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作者：
Xue Zhang;Qing-Guo Huang
我们报告了从威尔金森微波各向异性探测器 (WMAP) 9 年数据结合最新重子声振荡 (BAO) 测量获得的 H0 约束。我们使用 6dF 星系巡天 (6dFGS)、SDSS DR7 主星系样本 (MGS)、BOSS DR12 星系和 eBOSS DR14 类星体的 BAO 测量结果。将最近的 BAO 测量结果添加到 WMAP 的宇宙微波背景（CMB）数据中，我们将宇宙学参数 Ωm = 0.298 ± 0.005、H0=68.36−0.52+0.53km⋅s−1⋅Mpc−1 、σ8=0.8170−0.0175+0.0159 约束在空间平坦的 Λ 冷暗物质中(ΛCDM) 模型，空间平坦的 wCDM 模型中分别为 Ωm = 0.302 ± 0.008，H0 = 67.63 ± 1.30 km ⋅ s−1 ⋅ Mpc−1，σ8=0.7988−0.0338+0.0345。我们测量的 H0 结果更喜欢低于 70 km ⋅ s−1 ⋅ Mpc−1 的值，与 Planck (2018) 的 CMB 约束的最新数据一致，但在 ΛCDM 和 wCDM 框架中分别采用 SH0ES (2018) 的局部测量，张力为 3.1 和 3.5σ。我们的结果表明，SH0ES 与 CMB 和 BAO 数据集的组合之间的哈勃常数存在系统张力。
We report the constraints of H0 obtained from Wilkinson Microwave Anisotropy Probe (WMAP) 9-year data combined with the latest baryonic acoustic oscillations (BAO) measurements. We use the BAO measurements from 6dF Galaxy Survey (6dFGS), the SDSS DR7 main galaxies sample (MGS), the BOSS DR12 galaxies, and the eBOSS DR14 quasars. Adding the recent BAO measurements to the cosmic microwave background (CMB) data from WMAP, we constrain cosmological parameters Ωm = 0.298 ± 0.005, H0=68.36−0.52+0.53km⋅s−1⋅Mpc−1 , σ8=0.8170−0.0175+0.0159 in a spatially flat Λ cold dark matter (ΛCDM) model, and Ωm = 0.302 ± 0.008, H0 = 67.63 ± 1.30 km ⋅ s−1 ⋅ Mpc−1, σ8=0.7988−0.0338+0.0345 in a spatially flat wCDM model, respectively. Our measured H0 results prefer a value lower than 70 km ⋅ s−1 ⋅ Mpc−1, consistent with the recent data on CMB constraints from Planck (2018), but in 3.1 and 3.5σ tension with local measurements of SH0ES (2018) in ΛCDM and wCDM framework, respectively. Our results indicate that there is a systematic tension on the Hubble constant between SH0ES and the combination of CMB and BAO datasets.