论文标题
解释宇宙各向异性：CMB数据的因果范围的证据
Explaining Cosmological Anisotropy: Evidence for Causal Horizons from CMB data
论文作者
论文摘要
在宇宙微波背景（CMB）和大规模结构数据中表现出的，功率不对称性和其他统计各向异性的统计各向异性措施是宇宙学上的长期开放问题。在本文中，我们分析了普朗克遗产温度各向异性数据，并找到了有力的证据，证明违反了各向同性的宇宙学原理，并有可能是〜10^-9的统计波动。检测到的各向异性与CMB天空的大尺度定向LCDM宇宙学参数变化有关，这些变化是由圆形尺寸在半径40至70度之间的图中的三个不同的斑块来源。我们讨论了我们发现对不同前景分离方法和分析选择的鲁棒性，并在将分析限制为相同量表时从WMAP数据中找到一致的结果。我们认为，宇宙学参数图内的这些明确定义的区域可能反映出可观察到的宇宙中有限和随便脱节的范围。特别是我们表明，在给定的地平线内观察到的关系之间观察到的关系与最近提出的宇宙模型的期望非常吻合，该模型解释了宇宙加速度和宇宙学参数张力在高红移和低红移宇宙之间与我们宇宙中休闲视野的存在。
The origin of power asymmetry and other measures of statistical anisotropy on the largest scales of the universe, as manifested in Cosmic Microwave Background (CMB) and large-scale structure data, is a long-standing open question in cosmology. In this paper we analyze the Planck Legacy temperature anisotropy data and find strong evidence for a violation of the Cosmological principle of isotropy, with a probability of being a statistical fluctuation of order ~ 10^-9. The detected anisotropy is related to large-scale directional LCDM cosmological parameter variations across the CMB sky, that are sourced by three distinct patches in the maps with circularly-averaged sizes between 40 to 70 degrees in radius. We discuss the robustness of our findings to different foreground separation methods and analysis choices, and find consistent results from WMAP data when limiting the analysis to the same scales. We argue that these well-defined regions within the cosmological parameter maps may reflect finite and casually disjoint horizons across the observable universe. In particular we show that the observed relation between horizon size and mean dark energy density within a given horizon is in good agreement with expectations from a recently proposed model of the universe that explains cosmic acceleration and cosmological parameter tensions between the high and low redshift universe from the existence of casual horizons within our universe.
