论文标题
修饰的重力对大型结构形成的影响
Effect of the modified gravity on the large scale structure formation
论文作者
论文摘要
我们研究了当前加速时代的大规模结构的形成，在$ f（r）$重力背景中。这是通过考虑低红移$ z <1 $的物质扰动的线性增长来完成的。 $ f（r）$的效果改变了物质密度扰动的行为，从物质主导的宇宙到延迟加速的宇宙，该宇宙在牛顿引力常数中编码为$ g \ rightarrow g_ {eff} $。修改后的重力常数（$ g_ {eff} $）取决于$ f（r）$的形式。晚期加速扩张会通过减慢物质密度的生长来影响大规模结构的形成。另一方面，$ f（r）$增加了物质密度扰动的增长率。我们发现，$ f（r）$背景中的源术语，$ g_ {eff}ω_m$克服了加速的扩展和加速扩展的效果，抑制了渐近未来的大规模结构的形成。
We investigate the formation of the large scale structures in the present accelerated era in $f(R)$ gravity background. This is done by considering the linear growth of matter perturbations at low redshift $z<1$. The effect of $f(R)$ alters the behaviour of the matter density perturbations from the matter dominated universe to the late-time accelerated universe which is encoded in the Newtonian gravitational constant as $G\rightarrow G_{eff}$. The modified gravitational constant ($G_{eff}$) depends on the form of $f(R)$. The late-time accelerated expansion affects the formation of large scale structures by slowing down the growth of matter density. On the other hand, $f(R)$ increases the growth rate of the matter density perturbations. We have found that the source term in $f(R)$ background, $G_{eff}Ω_m$ overcomes the accelerated expansion and the effect of accelerated expansion suppresses the formation of the large scale structures in the asymptotic future.
