论文标题
空间平坦的宇宙的证据
The evidence for a spatially flat Universe
论文作者
论文摘要
在最近声称普朗克数据有利于封闭的宇宙之后，我们重新审视了空间曲率的观察性约束。我们使用一种新的统计功能强大的Planck可能性来表明Planck温度和极化光谱与空间平坦的宇宙一致，尽管由于几何脱落式宇宙微波背景光谱并不会对曲率密度参数omomega_k产生严格的约束。当与其他天体物理数据（尤其是Baryon声学振荡的几何测量）结合使用时，宇宙被限制在空间上平坦至极高的精度，欧米茄k = 0.0004 +/- 0.0018与Planck团队的2018年结果一致。在通货膨胀宇宙学的背景下，观察结果为通货膨胀模型提供了强有力的支持。
We revisit the observational constraints on spatial curvature following recent claims that the Planck data favour a closed Universe. We use a new and statistically powerful Planck likelihood to show that the Planck temperature and polarization spectra are consistent with a spatially flat Universe, though because of a geometrical degeneracy cosmic microwave background spectra on their own do not lead to tight constraints on the curvature density parameter Omega_K. When combined with other astrophysical data, particularly geometrical measurements of baryon acoustic oscillations, the Universe is constrained to be spatially flat to extremely high precision, with Omega_ K = 0.0004 +/-0.0018 in agreement with the 2018 results of the Planck team. In the context of inflationary cosmology, the observations offer strong support for models of inflation with a large number of e-foldings and disfavour models of incomplete inflation.
