论文标题
下一代调查的CMB镜头功率谱
CMB lensing power spectrum with next generation surveys
论文作者
论文摘要
我们基于迭代透镜重建，我们引入了CMB镜头功率谱的新估计器以及其可能性。尽管镜头图的复杂性增加了，但该估计值与标准二次估计器具有相似之处。最重要的是，它对对镜头重建的噪声和宇宙学的假设没有偏见。与二次估计器相比，这种新的频谱估计器可以将镜头幅度的约束增加一倍，同时保持数值成本受到控制并稳健地对错误。
We introduce a new estimator of the CMB lensing power spectrum, together with its likelihood, based on iterative lensing reconstruction. Despite the increased complexity of the lensing maps, this estimator shares similarities with the standard quadratic estimator. Most importantly, it is unbiased towards the assumptions done on the noise and cosmology for the lensing reconstruction. This new spectrum estimator can double the constraints on the lensing amplitude compared to the quadratic estimator, while keeping numerical cost under control and being robust to errors.
