The Cold Spot is a statistically significant anomaly in the Cosmic Microwave Background (CMB) sky. In this work we assess whether a huge void or a cosmic texture could have produced such an anomaly through searching for their gravitational redshift (Rees-Sciama effect) and lensing signatures on the {\it Planck} CMB sky. In the flat sky approximation, we find the amplitudes for the corresponding templates for both candidates consistent with zero, leaving little room, according to {\it Planck}, for those structures as the main source of the Cold Spot anomaly.

中文翻译：

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普朗克光中的CMB冷点

冷点是宇宙微波背景 (CMB) 天空中具有统计意义的异常现象。在这项工作中，我们通过在 {\it Planck} CMB 天空上寻找引力红移（里斯-席玛效应）和透镜特征来评估巨大的空洞或宇宙纹理是否会产生这种异常。在平坦的天空近似中，我们发现两个候选对象的相应模板的振幅都为零，根据 {\it Planck}，对于那些作为冷点异常主要来源的结构，留下的空间很小。