论文标题
Subhalos的半分析框架从最小到最大的规模
Semi-analytical frameworks for subhalos from the smallest to the largest scale
论文作者
论文摘要
暗物质光环的子结构（称为Subhalos）为了解暗物质的性质提供了重要的线索。我们构建了一个有用的模型，以基于众所周知的分析处方，即扩展的新闻技术理论来描述Subhalo质量函数的特性。在不引入自由参数的情况下，在任意质量尺度上的未发展的subhalo质量函数变得可描述。不同的宿主光环进化史直接重铸了其subhalo质量功能。作为应用，我们量化了（i）泊松波动，（ii）宿主质量散射，以及（iii）使用该方案在当前宇宙中可观察到的（iii）不同的潮汐进化模型。泊松波动在质量比与$ \ sim {\ cal o}（10^{ - 2}）$的主机的数量计数中占主导地位，其中固有散布较小。宿主质量散布在其平均值周围不会影响Subhalo质量函数。潮汐进化的不同模型预测了$ \ sim2 $的因子，$ \ sibhalos的数量差异为$ \ lyseSim {\ cal o}（10^{ - 5}）$，而潮汐进化模型上泊松波动的依赖性是微妙的。该方案提供了一种新工具，用于研究我们宇宙中最小的结构，这在不久的将来实验中可以观察到。
Substructures of dark matter halo, called subhalos, provide important clues to understand the nature of dark matter. We construct a useful model to describe the properties of subhalo mass functions based on the well-known analytical prescriptions, the extended Press-Schechter theory. The unevolved subhalo mass functions at arbitrary mass scales become describable without introducing free parameters. The different host halo evolution histories are directly recast to their subhalo mass functions. As applications, we quantify the effects from (i) the Poisson fluctuation, (ii) the host mass scatter, and the (iii) different tidal evolution models on observables in the current Universe with this scheme. The Poisson fluctuation dominates in the number count of the mass ratio to the host of $\sim {\cal O}(10^{-2})$, where the intrinsic scatter is smaller by a factor of a few. The host-mass scatter around its mean does not affect the subhalo mass function. Different models of the tidal evolution predict a factor of $\sim2$ difference in numbers of subhalos with $\lesssim {\cal O}(10^{-5})$, while the dependence of the Poisson fluctuation on the tidal evolution models is subtle. The scheme provides a new tool for investigating the smallest-scale structures of our Universe which are to be observed in near future experiments.
