论文标题
普朗克灯中的CMB冷点
CMB Cold Spot in the Planck light
论文作者
论文摘要
在宇宙微波背景（CMB）的天空中，冷点被热环包围着异常冷的区域，是统计学意义的异常。在这项工作中，我们评估了基于2DF-VST ATLAS冷点Galaxy Redshift调查或倒塌的宇宙纹理的不同多个亚维体，是否可以通过同时搜索其引力红移和透镜签名{\ it itplanck} cmb} cmb温度anisosopies。我们使用Radii $ r = 10^\ circ $和$ r = 20^\ circ $的补丁，以解释内部冷区域以及外部热环。作为空隙模型，我们探索了两组$λ$ LTB模板，这些模板的特征是模型的自由参数的不同值和顶部帽子空隙模板。我们检测到前两组的高度重力红移幅度，$ \ Mathcal {a} _ {\ rm rm rs} = 5.4 \ pm 1.4 $ 1.4 $和$ \ Mathcal {a} _} _ { $ \ Mathcal {a} _ {\ rm rs} = 0.3 \ pm 0.1 $。对于所有这些亚维体模型而言，镜头烙印的振幅与零一致。重力红移测量的纹理烙印的估计振幅意味着质地的能量尺度，$ε$参数为$ε=（7.6 \ pm2.0）\ times 10^{ - 5} $，没有检测到镜头痕迹的曲线。我们注意到，亚玻璃幅度远离统一的偏差，质地的无能以及一些空隙曲线复制热环，表明在模型的构建中，或在假定的引力和宇宙学框架中构建了理论上的不足。
The Cold Spot, with an unusually cold region surrounded by a hot ring, is a statistically significant anomaly in the Cosmic Microwave Background (CMB) sky. In this work we assess whether different sets of multiple subvoids based on the 2dF-VST ATLAS Cold Spot galaxy redshift survey or a collapsing cosmic texture could have produced such an anomaly through a simultaneous search for their gravitational redshift and lensing signatures on the {\it Planck} CMB temperature anisotropies. We use patches with radii $R=10^\circ$ and $R=20^\circ$ to account for the inner cold region as well as the outer hot ring. As the void model, we explore two sets of $Λ$LTB templates characterized by different values of the model's free parameters, and a top-hat void template. We detect higher-than-expected gravitational redshift amplitudes for the first two sets, $\mathcal{A}_{\rm rs}=5.4\pm 1.4$ and $\mathcal{A}_{\rm rs}=14.4\pm 3.8$, and lower than expected for the top-hat model, $\mathcal{A}_{\rm rs}=0.3 \pm 0.1$. The amplitudes for the lensing imprint are consistent with zero for all these subvoid models. The estimated amplitude for the texture imprint from the gravitational redshift measurement implies the energy scale of the texture, parametrized by $ε$, to be $ε= (7.6\pm2.0)\times 10^{-5}$, with no detection of the lensing trace. We note that the deviation of the subvoid amplitudes from unity and the inability of the texture and some of the void profiles to reproduce the hot ring indicate theoretical insufficiencies, either in the construction of the model or in the assumed gravitational and cosmological framework leading to the imprints for the structures.
