论文标题
准确的综合基础结构方法：iii。主机光环的质量和形成时间
An Accurate Comprehensive Approach to Substructure: III. Masses and Formation Times of the Host Haloes
论文作者
论文摘要
在本文中，我们完成了对暗物质光环中的子结构的全面研究。在纸上，我们得出了积subhoes的径向分布和质量功能（MF）（缩放到宿主晕的半径和质量），并表明它们基本上是通用的。但是，对于剥夺的subhaloes的人来说，情况并非如此，这取决于光环质量和组装历史。在论文II中，我们在最简单的纯粹吸收光环的情况下得出了这些后一种特性。在这里，我们将研究扩展到遭受主要合并的普通光环。在证明所有子结构的所有特性均在平均截断的截面次荷兰质量比分布中编码后，我们证明了亚荷兰MF对晕halo质量的依赖性依赖于质量依赖性浓度，而亚哈洛辐射分布的形状取决于宿主卤素的最后一个大型合并的时间。从这个意义上讲，后一种属性比前者更好地探究光环形成时间。不幸的是，卫星的径向分布并非如此，因为该轮廓基本上与subhalo剥离断开了，并且积聚的subhaloes的性质与光环形成时间无关。
With this Paper we complete a comprehensive study of substructure in dark matter haloes. In Paper I we derived the radial distribution and mass function (MF) of accreted subhaloes (scaled to the radius and mass of the host halo) and showed they are essentially universal. This is not the case, however, for those of stripped subhaloes, which depend on halo mass and assembly history. In Paper II we derived these latter properties in the simplest case of purely accreting haloes. Here we extend the study to ordinary haloes having suffered major mergers. After showing that all the properties of substructure are encoded in the mean truncated-to-original subhalo mass ratio profile, we demonstrate that the dependence of the subhalo MF on halo mass arises from their mass-dependent concentration, while the shape of the subhalo radial distribution depends on the time of the last major merger of the host halo. In this sense, the latter property is a better probe of halo formation time than the former. Unfortunately, this is not the case for the radial distribution of satellites as this profile is essentially disconnected from subhalo stripping and the properties of accreted subhaloes are independent of the halo formation time.
