论文标题
Dirac-Milne Universe中的结构形成：与标准宇宙学模型进行比较
Structure formation in a Dirac-Milne universe: comparison with the standard cosmological model
论文作者
论文摘要
复杂的分层引力结构的存在是观察到的宇宙的主要特征之一。在这里，对标准（$λ\ rm cdm $）宇宙学模型的结构形成和dirac-Milne Universe进行了研究。一维数值模拟揭示了两个模型之间的类比和差异。尽管在Dirac-Milne Universe中结构的形成速度更快，但两种模型都预测，它在目前的时代之前不久结束，Dirac-Milne Cosmology的宇宙红移$ Z \约3 $，对于$ Z \ $ Z \ to $λ\ rm cdm $ Universe。目前的结果表明，斯隆数字天空调查观察到的物质功率谱可能完全是由于物质的非线性演变和相对较小的初始维度的反物质域的进化，即在宇宙学红移$ z = 1080 $的几十个parsecs comovs comovs comovs comovs comovs的订单。
The presence of complex hierarchical gravitational structures is one of the main features of the observed universe. Here, structure formation is studied both for the standard ($Λ\rm CDM$) cosmological model and for the Dirac-Milne universe, a matter-antimatter symmetric universe that was {\gm recently} proposed as an alternative "coasting" cosmological scenario. One-dimensional numerical simulations reveal the analogies and differences between the two models. Although structure formation is faster in the Dirac-Milne universe, both models predict that it ends shortly before the present epoch, at cosmological redshift $z \approx 3$ for the Dirac-Milne cosmology, and at $z \approx 0.5$ for the $Λ\rm CDM$ universe. The present results suggest that the matter power spectrum observed by the Sloan Digital Sky Survey might be entirely due to the nonlinear evolution of matter and antimatter domains of relatively small initial dimensions, of the order of a few tens of parsecs comoving at cosmological redshift $z =1080$.
