论文标题
带有扰动理论的红移空间光环功率谱中的建模特征
Modeling features in the redshift-space halo power spectrum with perturbation theory
论文作者
论文摘要
我们研究了具有有效现场理论贡献和红外重新点燃的扰动模型在线性功率谱具有“特征”的模型中对偏移示踪剂的红移空间聚类进行建模的能力，要么是在通货膨胀期间印刷或由非标准扩展历史引起的。我们表明，Eulerian和Lagrangian扰动理论都能够从$ 4096^3 $粒子n体型模拟的套件中将光环的傅立叶空间两点函数重现至非线性尺度。这是第一次演示，即扰动模型可以准确地拟合偏置示踪剂的红移空间聚类，以在此类理论的N体模拟中。通过比较不同的理论模型和IR重新调整方案，我们评估了具有特征模型的电源谱时的当前理论不确定性。我们的结果表明，未来的调查将能够检测或严格约束原始频谱中的特征，低于一定范围的一定范围。
We study the ability of perturbative models with effective field theory contributions and infra-red resummation to model the redshift space clustering of biased tracers in models where the linear power spectrum has "features" -- either imprinted during inflation or induced by non-standard expansion histories. We show that both Eulerian and Lagrangian perturbation theory are capable of reproducing the Fourier space two-point functions of halos up to the non-linear scale from a suite of $4096^3$ particle N-body simulations. This is the first demonstration that perturbative models can accurately fit the redshift-space clustering of biased tracers in N-body simulations of such theories. By comparing different theoretical models and IR resummation schemes we assess the current theoretical uncertainty in predicting power spectra for models with features. Our results suggest that future surveys will be able to detect or tightly constrain features in the primordial spectrum below the one percent level across a wide range of scales.
