论文标题
可观察到的星系 - 果态镜头的定位转换
Localizing Transformations of the Galaxy-Galaxy Lensing Observable
论文作者
论文摘要
星系 - 半镜头镜头的现代宇宙学分析面临着由观察到的星系 - 果胶镜头信号的非本地性产生的理论系统效应。由于在给定的分离处预测的切向剪切信号取决于该分离内部所有尺度上的物理建模，因此将非线性小尺度模型中的系统不确定性向外传播到较大的尺度。即使在没有其他限制因素的情况下，仅这种系统效应就可能需要保守的小规模削减，从而导致切向剪切数据向量中的信息损失很大。我们构建了可观察到的简单线性转换，该线性转换消除了这种非本地性，从而为给定的理论模型提供了更具侵略性的小规模剪辑。我们经过修改的星系 - 半镜头镜头可观察到的可观察到与宇宙学分析中标准方法相比，对尺度明显小的观测值。更重要的是，它可以确保可观察到的宇宙学信号仅根据众所周知的物理量表来绘制。
Modern cosmological analyses of galaxy-galaxy lensing face a theoretical systematic effect arising from the non-locality of the observed galaxy-galaxy lensing signal. Because the predicted tangential shear signal at a given separation depends on the physical modeling on all scales internal to that separation, systematic uncertainties in the modeling of non-linear small scales are propagated outwards to larger scales. Even in the absence of other limiting factors, this systematic effect alone can necessitate conservative small-scale cuts, resulting in significant losses of information in the tangential shear data vector. We construct a simple linear transformation of the observable that removes this non-locality, enabling more aggressive small-scale cuts for a given theoretical model. Our modified galaxy-galaxy lensing observable makes it possible to include observations on significantly smaller scales than those under the standard approach in cosmological analyses. More importantly, it ensures that the cosmological signal contained within the observable is exclusively drawn from well-understood physical scales.
