空洞、纤维状大尺度结构形成的一个模型

A Model for the Formation of Voids and Filaments in the Universe

本文用N-体数值模拟对标准宇宙的大尺度结构进行了研究,给出了一个能形成空洞、纤维状结构的模型。该模型意味着,密度扰动存在超团的特征尺度,并且,在较小的尺度上,扰动也没有全被抹平。

In this paper, a model for the formation of voids and filaments in the universe is suggested using, numerical simulations. The standard cosmology is adopted-and the Ω = 1.0.The initial condition is composed of both Poisson distribution and the adiabatic perturbation. The perturbation is truncated in low wavelength band and has- a characteristic scale. The amplitude of perturbation is taken as 0.25 and 0.125.The results have revealed that in this 'hybrid' model the voids and, filaments can appear if, comparing with Poisson perturbation, the amplitude of adiabatic perturbation is large enough. Otherwise, only clusters appear.