论文标题
最小重力理论的非线性动力学
Non-linear dynamics of the minimal theory of massive gravity
论文作者
论文摘要
我们研究了最小重力理论（MTMG）的宇宙学特征。为此，我们通过采用\ textsc {ramses} \ mbox {$ n $ -body}代码来模拟MTMG的普通分支，并使用有效的引力常数$ g _ {\ rm eff} $将其扩展。我们实现了一个依赖环境的$ g _ {\ rm eff} $，作为Graviton质量的函数和MTMG预测的局部能量密度。我们发现光环密度曲线对MTMG不是一个很好的探针，因为与一般相对论（GR）的偏差相当小。同样，物质功率谱仅显示在百分比水平上的偏差。但是，我们发现MTMG和GR之间存在明显的差异，因为MTMG的空隙比GR中更密集。从观察性的角度来看，测量空隙曲线是一项非常复杂的任务，因此更好的MTMG探针将是光晕的丰度。在这种情况下，MTMG会产生大量的大量光环，而在大量的小晕圈中却有抑制作用。
We investigate cosmological signatures of the minimal theory of massive gravity (MTMG). To this aim, we simulate the normal branch of the MTMG by employing the \textsc{Ramses} \mbox{$N$-body} code and extending it with an effective gravitational constant $G_{\rm eff}$. We implement an environment-dependent $G_{\rm eff}$ as a function of the graviton mass and the local energy density as predicted by MTMG. We find that halo density profiles are not a good probe for MTMG, because deviations from general relativity (GR) are quite small. Similarly, the matter power spectra show deviations only at the percentage level. However, we find a clear difference between MTMG and GR in that voids are denser in MTMG than in GR. As measuring void profiles is quite a complex task from an observational point of view, a better probe of MTMG would be the halo abundances. In this case, MTMG creates a larger amount of massive halos, while there is a suppression in the abundance of small halos.
