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arXiv 1002.1232astro-ph.COgr-qc
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大尺度的不均匀性可能会改善超新星的宇宙一致性

Large-scale inhomogeneities may improve the cosmic concordance of supernovae

Luca Amendola, Kimmo Kainulainen, Valerio Marra, Miguel Quartin

摘要:

我们重新分析了来自Union Compilation的超新星数据,包括不均匀性引起的弱透镜效应。我们计算透镜的概率分布函数为每个背景的解决方案所描述的参数欧米茄_M,欧米茄_L和w的不均匀性的存在下,近似建模与单质量人口的晕。然后,我们在FLRW参数的空间中进行似然分析,并将我们的结果与标准方法进行比较。我们发现,包括透镜可以移动的最佳拟合模型显着的宇宙一致性的平坦LCDM模型,改善协议来自宇宙微波背景和重子声学振荡的约束。

英文摘要:

We reanalyze the supernovae data from the Union Compilation including the weak lensing effects caused by inhomogeneities. We compute the lensing probability distribution function for each background solution described by the parameters Omega_M, Omega_L and w in the presence of inhomogeneities, approximately modeled with a single-mass population of halos. We then perform a likelihood analysis in the space of FLRW-parameters and compare our results with the standard approach. We find that the inclusion of lensing can move the best-fit model significantly towards the cosmic concordance of the flat LCDM model, improving the agreement with the constraints coming from the cosmic microwave background and baryon acoustic oscillations.

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