标题： 尺度相关的晕动偏差来自尺度相关的增长 显示英文标题

标题： Scale-dependent halo bias from scale-dependent growth

摘要： 我们利用穿越集公式推导出了一种大尺度晕动偏倚的一般表达式，这种表达适用于具有尺度相关线性增长的理论中。这些理论包括修改引力模型以及暗能量聚类不可忽略的模型。由尺度相关增长所引起的效应会在形成和演化偏倚中留下尺度相关的印记。在我们的推导过程中考虑到了星系合并，因此该工作扩展了之前专注于被动演化的研究。 对于那些扰动非线性坍缩与广义相对论中近似相同的理论，偏倚存在一个简单的解析形式。作为一个例子，我们将结果应用于引力的简单约化反作用模型，并利用SDSS（斯隆数字巡天）明亮红星系聚类测量来约束理论参数。 显示英文摘要

摘要： We derive a general expression for the large-scale halo bias, in theories with a scale-dependent linear growth, using the excursion set formalism. Such theories include modified gravity models, and models in which the dark energy clustering is non-negligible. A scale dependence is imprinted in both the formation and evolved biases by the scale-dependent growth. Mergers are accounted for in our derivation, which thus extends earlier work which focused on passive evolution. There is a simple analytic form for the bias for those theories in which the nonlinear collapse of perturbations is approximately the same as in general relativity. As an illustration, we apply our results to a simple Yukawa modification of gravity, and use SDSS measurements of the clustering of luminous red galaxies to constrain the theory's parameters.