论文标题
非线性红移空间星系功率谱的快速计算，包括选择偏差
Fast Calculation of Nonlinear Redshift-space Galaxy Power Spectrum Including Selection Bias
论文作者
论文摘要
我们通过使用基于FFTLOG的方法来快速实现近距离领先顺序（1循环）红移空间电源谱。 [V. Desjacques，D。Jeong和F. Schmidt，JCAP 1812（12），035]表明，RedShift空间中的1循环星系功率谱可以使用28个具有22个独立的Loop积分来计算，具有22个偏置参数。回路积分的角部分的分析计算使径向部分以球形贝塞尔变换的形式形式，该部分准备通过使用FFTLOG变换来数字地集成。我们发现，可以通过总共85个独特的FFTLOG变换来解决原始的28个环积分，但导致了几个数量级的速度，而不是传统的多维集成。这项工作中使用的代码可在https://github.com/josephtomlinson/generalbiaspk上公开获得
We present a fast implementation of the next-to-leading order (1-loop) redshift-space galaxy power spectrum by using FFTlog-based methods. [V. Desjacques, D. Jeong, and F. Schmidt, JCAP 1812 (12), 035] have shown that the 1-loop galaxy power spectrum in redshift space can be computed with 28 independent loop integrals with 22 bias parameters. Analytical calculation of the angular part of the loop integrals leaves the radial part in the form of a spherical Bessel transformation that is ready to be integrated numerically by using the FFTLog transformation. We find that the original 28 loop integrals can be solved with a total of 85 unique FFTLog transformations, yet leading to a few orders of magnitude speed up over traditional multi-dimensional integration. The code used in this work is publicly available at https://github.com/JosephTomlinson/GeneralBiasPk
