论文标题
测试$ f（r）$重力与比例依赖的宇宙空隙速度配置文件
Testing $f(R)$ Gravity With Scale Dependent Cosmic Void Velocity Profiles
论文作者
论文摘要
我们通过比较结合了hu-sawicki $ f（r）$重力的n身体模拟，研究宇宙学量表修饰对通用相对性对空白动力学的影响，其中$ | f_ {r0} | = 10^{ - 6} $和$ 10^{ - 5} $ cdm $ ccdm $ cdm $ cdm $ cdm $ cdm $ cdm $ cdm $ cdm $ 10^{ - 5} $。 By examining the radial velocity statistics within voids classified based on their size and density-profile, as "rising" ($R$-type) or "shell" ($S$-type), we find that halo motions in small $R$-type voids, with effective radius $<15 Mpc/h$, reveal distinctive differences between $f(R)$ and $Λ$CDM cosmologies. 为了理解这种观察到的效果，我们研究了线性和非线性第五力，并开发了一种迭代算法以准确求解非线性的第五力方程。我们用它来表征空隙中的变色龙筛选机制，并将其与重力崩溃的物体中观察到的行为进行对比。 力分析强调了较小的$ r $ type空隙如何表现出第五力与牛顿力的最高比率，牛顿力量的速度差异是可区分的速度差异，从而提供了丰富的环境来限制重力。
We study the impact of cosmological scale modifications to General Relativity on the dynamics of halos within voids by comparing N-body simulations incorporating Hu-Sawicki $f(R)$ gravity, with $|f_{R0}|=10^{-6}$ and $10^{-5}$, to those of $Λ$CDM. By examining the radial velocity statistics within voids classified based on their size and density-profile, as "rising" ($R$-type) or "shell" ($S$-type), we find that halo motions in small $R$-type voids, with effective radius $<15 Mpc/h$, reveal distinctive differences between $f(R)$ and $Λ$CDM cosmologies. To understand this observed effect, we study the linear and nonlinear fifth forces, and develop an iterative algorithm to accurately solve the non-linear fifth force equation. We use this to characterize the Chameleon screening mechanism in voids and contrast the behavior with that observed in gravitationally collapsed objects. The force analysis underscores how smaller $R$-type voids exhibit the highest ratios of fifth force to Newtonian force, which source distinguishable differences in the velocity profiles and thereby provide rich environments in which to constrain gravity.
