Evidence for massive neutrinos from cosmic microwave background and lensing observations.
Evidence for massive neutrinos from cosmic microwave background and lensing observations.
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DOI：
10.1103/physrevlett.112.051303
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发表时间：
2013-08
影响因子：
8.6
通讯作者：
R. Battye;A. Moss
中科院分区：
文献类型：
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作者：
R. Battye;A. Moss
我们讨论了大质量中微子（无论是活跃的或无菌的）是否可以调和宇宙学数据中的一些紧张局势，最近公布的普朗克数据已经成为焦点。我们指出，一个差异是目前比较的主要CMB和透镜测量时，从CMB和星系透镜数据使用CFHTLenS，类似的CMB测量和SZ集群计数比较时出现的。一个一致的图像出现，包括一个先验的集群约束和BAO，我们发现，对于一个活跃的中微子模型与三个简并中微子，∑m（ν）=（0.320±0.081）eV，而对于一个不育中微子，除了3个具有标准能级的中微子和∑m（ν）=0.06 eV外，m（ν，无菌）（eff）=（0.450±0.124）eV，ΔN（eff）=0.45±0.23。在这两种情况下，有一个显着的检测修改中微子部门从标准模型和无菌中微子的情况下，它是可能的，以调和的BAO和本地H0测量。然而，我们的结果需要注意的是，CMB与透镜和星系团观测之间存在一些内部紧张关系，并且质量超过了从星系巡天的物质功率谱形状估计的质量。
We discuss whether massive neutrinos (either active or sterile) can reconcile some of the tensions within cosmological data that have been brought into focus by the recently released Planck data. We point out that a discrepancy is present when comparing the primary CMB and lensing measurements both from the CMB and galaxy lensing data using CFHTLenS, similar to that which arises when comparing CMB measurements and SZ cluster counts. A consistent picture emerges and including a prior for the cluster constraints and BAOs we find that for an active neutrino model with three degenerate neutrinos, ∑m(ν)=(0.320±0.081) eV, whereas for a sterile neutrino, in addition to 3 neutrinos with a standard hierarchy and ∑m(ν)=0.06 eV, m(ν,sterile)(eff)=(0.450±0.124) eV and ΔN(eff)=0.45±0.23. In both cases there is a significant detection of modification to the neutrino sector from the standard model and in the case of the sterile neutrino it is possible to reconcile the BAO and local H0 measurements. However, a caveat to our result is some internal tension between the CMB and lensing and cluster observations, and the masses are in excess of those estimated from the shape of the matter power spectrum from galaxy surveys.