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arXiv 1306.5544astro-ph.COhep-ph
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普朗克和星系团数据对中微子质量的约束

Constraints on neutrino masses from Planck and Galaxy Clustering data

Elena Giusarma, Roland de Putter, Shirley Ho, Olga Mena

摘要:

我们在这里提出的中微子质量的界限,从最近的普朗克宇宙微波背景测量和星系聚类的重子振荡光谱调查(BOSS),斯隆数字巡天III的一部分的信息相结合。我们使用的光度角聚类(数据发布8)或三维光谱聚类(数据发布9)在不同的宇宙学场景的功率谱的完整形状。在Lambda$CDM的情况下,光谱星系聚类测量显着改善现有的中微子质量边界从普朗克数据。我们发现,在95%的置信水平的组合的3D功率谱与普朗克CMB数据(包括透镜)和威尔金森微波各向异性探针9年偏振测量的总和mnu < 0.39 eV。因此,不需要在HST的哈勃常数上增加先验,就可以得到强有力的中微子质量约束。在扩展的宇宙学场景与暗能量流体或与非平坦的几何形状,星系团的测量是必不可少的,以牵制中微子质量的界限,在大多数情况下提供更好的结果比从相关的测量的重子声学振荡规模。在自由变化的(恒定的)暗能量状态方程的存在下,我们发现总和mnu <0.49 eV在95%的置信水平的组合的3D功率谱与普朗克CMB数据(包括透镜)和威尔金森微波各向异性探针9年的偏振测量。在非平坦几何条件下,相同的数据组合提供了中微子质量束缚和m_nu<0.35 eV,置信水平为95%。

英文摘要:

We present here bounds on neutrino masses from the combination of recent Planck Cosmic Microwave Background measurements and galaxy clustering information from the Baryon Oscillation Spectroscopic Survey (BOSS), part of the Sloan Digital Sky Survey-III. We use the full shape of either the photometric angular clustering (Data Release 8) or the 3D spectroscopic clustering (Data Release 9) power spectrum in different cosmological scenarios. In the Lambda$CDM scenario, spectroscopic galaxy clustering measurements improve significantly the existing neutrino mass bounds from Planck data. We find sum m_nu< 0.39 eV at 95% confidence level for the combination of the 3D power spectrum with Planck CMB data (with lensing included) and Wilkinson Microwave Anisoptropy Probe 9-year polarization measurements. Therefore, robust neutrino mass constraints can be obtained without the addition of the prior on the Hubble constant from HST. In extended cosmological scenarios with a dark energy fluid or with non flat geometries, galaxy clustering measurements are essential to pin down the neutrino mass bounds, providing in the majority of cases better results than those obtained from the associated measurement of the Baryon Acoustic Oscillation scale only. In the presence of a freely varying (constant) dark energy equation of state, we find sum m_nu<0.49 eV at 95% confidence level for the combination of the 3D power spectrum with Planck CMB data (with lensing included) and Wilkinson Microwave Anisoptropy Probe 9-year polarization measurements. This same data combination in non flat geometries provides the neutrino mass bound sum m_nu<0.35 eV at 95% confidence level.

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