论文标题
晚期宇宙中宇宙各向异性的非线性模式
The nonlinear patterns of the cosmic anisotropy in the late time universe
论文作者
论文摘要
在本手稿中，我们研究了观察者与完美的流体共同移动的宇宙学各向异性所满足的模式，该假设与完美的流体共同移动，其诱导的空间部分与消失的标态曲率均匀。我们描述了各向异性模型中哈勃参数的正增量$ΔR$，将其与各向同性对应物进行比较。通常，它在特定的红移$ z_a $上具有指数觉醒。我们还表明，沿各向异性的主要方向的减速和混蛋受到简单代数方程的约束，这些方程不取决于存在的物质类型。这些特征模式形成了一个有价值的框架，可以将宇宙学各向异性与任何其他种类区分开，从而增加了一个有用的工具来探测其在超新星调查中的上限，这与CMB中观察到的范围相比是数量级。
In this manuscript, we investigate the patterns satisfied by the cosmological anisotropy under the hypothesis of the observers being co-moving with a perfect fluid whose induced space sections are homogeneous with vanishing scalar curvature. We describe the positive increment $ΔR$ that the Hubble parameter in the anisotropic model will have as it is compared to its isotropic counterpart. In general, it has an exponential awakening at a specific redshift $z_A$. We also show that the deceleration and the jerk along the principal directions of the anisotropy are constrained by simple algebraic equations that do not depend on the type of matter present. These characteristic patterns form a valuable framework to distinguish the cosmological anisotropy from any other kind, thus adding a useful tool to probe its upper limits in the supernovae surveys, which are orders of magnitude away from those observed in the CMB.
