论文标题
离散黑洞晶格宇宙学模型中的观察性反应
Observational backreaction in discrete black holes lattice cosmological models
论文作者
论文摘要
应用Sachs形式主义，沿距离模量中编码的光学特性沿着曲线进行了研究，这些曲线表现出局部旋转对称性，用于某些封闭的不均匀宇宙学模型，这些模型的质量含量由Schwarzschild类似于Schwarzschild的来源离散。这些模型可能会在使用IA型超新星的距离模量数据时挑战一致性模型，因为它们不违反任何能量条件。该结果仅依赖于所考虑的对称属性，而不依赖于质量离散的方式。然后，通过引入紧凑性参数来比较具有不同来源数量的模型，并与具有相同总质量含量的Friedmann-Lemaitre-Robertson-Walker模型进行比较。分析表明，观察性反应发生之所以发生，是因为增加了源的数量，宇宙的特征没有恢复连续物质分布。我们的模型显示出运动学，动力学和观察性逆转之间的非平凡关系，运动运动是渐近下降的，而后两种则存在。此外，Weyl张量的电部分通过影响比例因子的演变来促进亮度距离，而磁性部分仅通过仅影响前者的演变而具有间接作用
Applying the Sachs formalism, the optical properties encoded in the distance modulus are studied along curves exhibiting local rotational symmetry for some closed inhomogeneous cosmological models whose mass content is discretized by Schwarzschild-like sources. These models may challenge the concordance model in its use of the distance modulus data of type Ia supernovae, because they do not violate any energy condition. This result relies only on the symmetry properties considered, and not on the way in which the mass is discretized. The models with different number of sources are then compared among themselves and with a Friedmann-Lemaitre-Robertson-Walker model with the same total mass content by introducing a compactness parameter. The analysis shows that observational backreaction occurs because increasing the number of sources the features of a universe with a continuous matter distribution are not recovered. Our models are shown to exhibit a non-trivial relationship between kinematical, dynamical and observational backreactions, the kinematical one being asymptotically decreasing while the latter two are present. Furthermore, the electric part of the Weyl tensor contributes to the luminosity distance by affecting the evolution of the scale factor, while the magnetic part has an indirect role by affecting only the evolution of the former
