Median Statistics Analysis of Deuterium Abundance Measurements and Spatial Curvature Constraints
Median Statistics Analysis of Deuterium Abundance Measurements and Spatial Curvature Constraints
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DOI：
10.1088/1538-3873/aadf75
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发表时间：
2018-08
影响因子：
3.5
通讯作者：
J. Penton;J. Peyton;Aasim Zahoor;Bharat Ratra
中科院分区：
文献类型：
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作者：
J. Penton;J. Peyton;Aasim Zahoor;Bharat Ratra
Zavarygin等人。汇编了15个氚丰度测量的清单；其中两个被丢弃，因为剩下的13个测量结果与高斯一致。这些作者发现，由13次测量确定的加权平均重子密度(Ωbh2)与由普朗克2015年宇宙微波背景各向异性数据在平坦宇宙中测定的结果略有差异(1.6σ)。我们发现，从所有15个氘丰度测量中得到的Ωbh2的中位数统计中心估计是一个更准确的估计；与从普朗克2015年数据估计的Ωbh2非常一致，但比从普朗克2015年数据的封闭宇宙模型中发现的低约2σ。
Zavarygin et al. compiled a list of 15 deuterium abundance measurements; two were discarded because the remaining 13 measurements are then consistent with Gaussianity. Those authors found that the weighted-mean baryon density (Ωbh2) determined from the 13 measurements is mildly discrepant (1.6σ) with that determined from the Planck 2015 cosmic microwave background anisotropy data in a flat cosmogony. We find that a median statistic central estimate of Ωbh2 from all 15 deuterium abundance measurements is a more accurate estimate; is very consistent with Ωbh2 estimated from Planck 2015 data in a flat cosmogony, but is about 2σ lower than that found in a closed cosmogonical model from the Planck 2015 data.