论文标题
现实世界中CMB镜头二次估计器功率谱响应
Real-world CMB lensing quadratic estimator power spectrum response
论文作者
论文摘要
我描述了一种估计宇宙微波背景（CMB）镜头镜头量估计器估算响应矩阵的方法，在现实条件下为真正的天空功率。它适用于基于二次估计器（QE）的所有镜头重建管道，它使用少量的高斯CMB蒙特卡洛群岛和专门设计的量化宽松，以便获得足够准确的矩阵，而计算工作很少。该方法可用于通过在CMB镜头重建中至少合并一些非理想性来改善CMB镜头带能力的建模。这些非理想性始终包括在谐波域或像素空间中的掩蔽且通常不均匀过滤。我获得了普朗克最新镜头重建的这些矩阵，然后证明掩盖所引起的残留耦合很好地解释了普朗克模拟上看到的残留乘法偏置，从而消除了对经验校正的需求。
I describe a method to estimate response matrices of Cosmic Microwave Background (CMB) lensing power spectra estimators to the true sky power under realistic conditions. Applicable to all lensing reconstruction pipelines based on quadratic estimators (QE), it uses a small number of Gaussian CMB Monte-Carlos and specially designed QE's in order to obtain sufficiently accurate matrices with little computational effort. This method may be used to improve the modelling of CMB lensing band-powers by incorporating at least some of the non-idealities encountered in CMB lensing reconstruction. These non-idealities always include masking, and often inhomogeneous filtering, either in the harmonic domain or pixel space. I obtain these matrices for Planck latest lensing reconstructions, and then show that the residual couplings induced by masking explain very well the residual multiplicative bias seen on the Planck simulations, removing the need for an empirical correction.
