顶帽模型中重子-暗物质双组分结构的形成
Two Component Baryonic-Dark Matter Structure Formation in Top-Hat Model
摘要：
本文将简单的大礼帽结构形成模型推广到重子和暗物质组成的二元系统。我们使用Harrison-Zeldovich谱作为初始条件的结构和计算他们的演变到现在的时间。虽然我们没有考虑到结构形成过程中的一些复杂情况，例如星系的合并，但这种形式主义可以从结构的形成中给我们一个定性的图像。我们表明，在这个模型中，小规模的结构演变速度比大的，它预测了自下而上的结构形成的情况。该模式的功率谱趋势与$σ_8 \sim 0.8$的观测结果一致。这种形式主义提供了一个结构生长的分析处理，可以很容易地显示宇宙学参数的结构的形成的影响。作为一个例子，研究了参数化的暗能量模型对结构生长的影响。
英文摘要：
In this work we extend simple top-hat model of structure formation to the two-component system made of baryonic and dark matter. We use Harrison-Zeldovich spectrum as the initial condition for the structures and calculate their evolution up to the present time. While we do not take into account some complications during the structure formation, such as the merging of galaxies, however this formalism can give us a qualitative picture from the formation of structures. We show that in this model small scale structures evolve faster than the larger ones and it predicts a down-top scenario for the structure formation. The trend of power spectrum in this model is compatible with the observations and results in $σ_8 \sim 0.8$. This formalism provides an analytic treatment of structure growth and can easily show the effect of the cosmological parameters on the formation of the structures. As an example, the effect of a parameterized dark energy model on the growth of the structures is investigated.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
