Weak lensing forecasts for dark energy, neutrinos and initial conditions
Weak lensing forecasts for dark energy, neutrinos and initial conditions
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DOI：
10.1111/j.1365-2966.2010.16284.x
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发表时间：
2009-11
影响因子：
2.4
通讯作者：
Ivan Debono;A. Rassat;A. Réfrégier;A. Amara;T. Kitching
中科院分区：
文献类型：
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作者：
Ivan Debono;A. Rassat;A. Réfrégier;A. Amara;T. Kitching
弱引力透镜通过测量低红移宇宙的质量分布和几何形状，提供了对宇宙参数的敏感探测。我们展示了全天弱透镜层析巡天如何共同约束描述暗能量、大质量中微子和原始功率谱的不同宇宙学参数集。利用Fisher矩阵形式，我们研究了当参数集扩大时约束是如何变化的。我们发现具有CMB先验的弱透镜提供了对暗能量参数的鲁棒约束，并且可以同时提供对所有三个参数集的强约束。我们还发现，暗能量领域在很大程度上对其他宇宙领域的纳入不敏感。
Weak gravitational lensing provides a sensitive probe of cosmological parameters by measuring the mass distribution and the geometry of the low redshift universe. We show how an all‐sky weak lensing tomographic survey can jointly constrain different sets of cosmological parameters describing dark energy, massive neutrinos, and the primordial power spectrum. Using the Fisher matrix formalism with and without CMB priors, we examine how the constraints vary as the parameter set is enlarged. We find that weak lensing with CMB priors provides robust constraints on dark energy parameters and can simultaneously provide strong constraints on all three parameter sets. We also find that the dark energy sector is largely insensitive to the inclusion of the other cosmological sectors.