论文标题
$λ$ cdm背景中的非刺激冷暗物质
Non-comoving Cold Dark Matter in a $Λ$CDM background
论文作者
论文摘要
我们研究了$λ$ CDM背景中局部不均匀宇宙结构局部阵列中奇特的速度（CDM）的演变，该阵列可以识别为与宇宙微波炉（CMB）共同识别的框架。这些阵列是通过与Szekeres-II模型的宇宙学背景区域平稳匹配来构建的，该模型的源是一种不完美的流体，将其重新解释为无刺激的灰尘，仅将一阶术语保留在$ v/c $中。 Considering a single Szekeres-II region matched along two comoving interfaces to a $Λ$CDM background, the magnitudes of peculiar velocities within this region are compatible with values reported in the literature, while the present day Hubble expansion scalar differs from that of the $Λ$CDM background value by a 10\% factor, a result that might provide useful information to the ongoing debate on the $H_0$ 紧张。尽管模型无法描述病毒化过程，但我们通过一个代表性的示例表明，银河簇质量的结构在$ z \ sim 3 $左右的红移时达到了此过程的开始。
We examine the evolution of peculiar velocities of cold dark matter (CDM) in localized arrays of inhomogeneous cosmic structures in a $Λ$CDM background that can be identified as a frame comoving with the Cosmic Microwave (CMB). These arrays are constructed by smoothly matching to this cosmological background regions of Szekeres-II models whose source is an imperfect fluid reinterpreted as non-comoving dust, keeping only first order terms in $v/c$. Considering a single Szekeres-II region matched along two comoving interfaces to a $Λ$CDM background, the magnitudes of peculiar velocities within this region are compatible with values reported in the literature, while the present day Hubble expansion scalar differs from that of the $Λ$CDM background value by a 10\% factor, a result that might provide useful information to the ongoing debate on the $H_0$ tension. While the models cannot describe the virialization process, we show through a representative example that structures of galactic cluster mass reach the onset of this process at redshifts around $z\sim 3$.
