论文标题
带有线性光环偏置的光环模型：来自星系 - 半镜头镜头和聚类的无偏宇宙学约束
The halo model with beyond-linear halo bias: unbiasing cosmological constraints from galaxy-galaxy lensing and clustering
论文作者
论文摘要
我们确定在采用线性光环偏置的标准近似值时，在联合光环模型分析中引入的误差和星系聚类可观察到的误差。考虑到千度调查，我们预测，忽略非线性光环偏置将导致最高5 $σ$偏移恢复的宇宙学参数，描述了结构增长，$ s_8 $，而物质密度参数，$ω_ {\ mathrm {m {m}} $。我们包括尺度$ 10^{ - 1.3} <r _ {\ rm {\ rm {p}} \ / h^{ - 1} \，\ Mathrm {mpc} <10 $在数据矢量中，这些偏移的方向证明了这些偏移的方向取决于通过其他Nuisance nuisancancancancancancancancancancancancance pamnersers提供的自由。我们得出的结论是，因此，必须将超级线性偏置校正校正包括在非线性尺度上的大规模结构的未来宇宙学光环模型分析中。
We determine the error introduced in a joint halo model analysis of galaxy-galaxy lensing and galaxy clustering observables when adopting the standard approximation of linear halo bias. Considering the Kilo-Degree Survey, we forecast that ignoring the non-linear halo bias would result in up to 5$σ$ offsets in the recovered cosmological parameters describing structure growth, $S_8$, and the matter density parameter, $Ω_{\mathrm{m}}$. We include the scales $10^{-1.3}<r_{\rm{p}} \ / h^{-1}\, \mathrm{Mpc}<10$ in the data vector, and the direction of these offsets are shown to depend on the freedom afforded to the halo model through other nuisance parameters. We conclude that a beyond-linear halo bias correction must therefore be included in future cosmological halo model analyses of large-scale structure observables on non-linear scales.
