论文标题
用于弱重力镜头的射线追踪对数正态模拟：与星系的互相关应用
Ray-tracing log-normal simulation for weak gravitational lensing: application to the cross-correlation with galaxies
论文作者
论文摘要
我们提出了一种算法，以在红移空间中产生模拟的弱引力透镜收敛场和星系分布。我们生成遵循对数正态分布的三维宇宙密度字段，并将射线跟踪以产生收敛图。当我们以与射线追踪一致的方式从相同的密度场产生星系分布时，从模拟的模拟中测量的星系连接跨力频谱与理论期望相符，高精度。我们使用此仿真来预测Subaru Hyper Suprime-CAM（HSC）和Prime Focus Spectragraph（PFS）调查的星系剪切互相关测量的质量。我们发现，名义HSC和PFS调查将分别以最低（$ z = 0.7 $）和最高（$ z = 2.2 $）的红移垃圾箱的信噪比为20和5的交叉功率谱。
We present an algorithm to self-consistently generate mock weak gravitational lensing convergence fields and galaxy distributions in redshift space. We generate three-dimensional cosmic density fields that follow a log-normal distribution, and ray-trace them to produce convergence maps. As we generate the galaxy distribution from the same density fields in a manner consistent with ray-tracing, the galaxy-convergence cross-power spectrum measured from the mock agrees with the theoretical expectation with high precision. We use this simulation to forecast the quality of galaxy-shear cross-correlation measurements from the Subaru Hyper Suprime-Cam (HSC) and Prime Focus Spectrograph (PFS) surveys. We find that the nominal HSC and PFS surveys would detect the cross power spectra with signal-to-noise ratios of 20 and 5 at the lowest ($z = 0.7$) and highest ($z = 2.2$) redshift bins, respectively.
