Constraints on Neutrino Masses from Weak Lensing
Constraints on Neutrino Masses from Weak Lensing
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DOI：
10.1103/physrevd.79.023520
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发表时间：
2008-10
影响因子：
5
通讯作者：
K. Ichiki;M. Takada;U. TomoTakahashiNagoya;Ipmu;U. Tokyo;U. Saga
中科院分区：
文献类型：
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作者：
K. Ichiki;M. Takada;U. TomoTakahashiNagoya;Ipmu;U. Tokyo;U. Saga
通过探讨大尺度结构中总物质对星团强度的抑制作用，揭示了遥远星系图像的弱透镜变形对中微子质量的敏感性。我们使用WL关联的最新测量，加拿大-法国-夏威夷望远镜遗产调查数据，来探索对中微子质量的限制。我们发现，虽然WL数据本身不能由于参数简并而对中微子质量施加严格的限制，但当结合其他宇宙学探测器，如WMAP 5年数据(WMAP5)和Ia型超新星(SNE)和重子声振荡(BAO)的距离测量时，这种限制可以得到显著改善。WL+WMAP5、WMAP5+SNE+BaO和WL+WMAP5+SNE+BaO的中微子质量之和的上限分别为0.76 eV和0.54 eV(95%CL)。在推导这些约束时，我们的分析包括了WL相关函数的非高斯协方差，以适当地考虑不同角度之间的显著相关性。
Weak lensing (WL) distortions of distant galaxy images are sensitive to neutrino masses by probing the suppression effect on clustering strengths of total matter in large-scale structure. We use the latest measurements of WL correlations, the Canada-France-Hawaii Telescope Legacy Survey data, to explore constraints on neutrino masses. We find that, while the WL data alone cannot place a stringent limit on neutrino masses due to parameter degeneracies, the constraint can be significantly improved when combined with other cosmological probes, such as the WMAP 5-year data (WMAP5) and the distance measurements of type-Ia supernovae (SNe) and baryon acoustic oscillations (BAO). The upper bounds on the sum of neutrino masses are , 0.76, and 0.54 eV (95% CL) for WL+WMAP5, WMAP5+SNe+BAO, and WL+WMAP5+SNe+BAO, respectively, assuming a flat {lambda}CDM model with finite-mass neutrinos. In deriving these constraints, our analysis includes the non-Gaussian covariances of the WL correlation functions to properly take into account significant correlations between different angles.