论文标题
大规模中微子对光晕组装偏置的影响
The impact of massive neutrinos on halo assembly bias
论文作者
论文摘要
使用公开可用的Quijote模拟，我们介绍了N体模拟中暗物质光环的组装偏置的第一个测量，其中包括大量中微子。我们专注于线性偏差$ b_1 $对三个光晕属性的依赖性：1）浓度$ c $，2）旋转$λ$，而3）椭圆性$ s $。尽管这些模拟涵盖了大量量，但要优于将来的任何调查，但我们并未发现中微子对$ b_1（c）$，$ b_1（λ）$和$ b_1 $和$ b_1（s）$的任何影响。我们进一步研究了光环特性和环境对中微子的依赖性，发现这些数量会受到与组装偏差相同水平的中微子质量影响的数量。我们发现，中微子对旋转和形状的影响很大程度上归因于中微子模拟中冷暗物质$σ_8$的变化，浓度不是这种情况。
Using the publicly available Quijote simulations, we present the first measurements of the assembly bias of dark matter halos in N-body simulations which include massive neutrinos. We focus on the dependence of the linear bias $b_1$ on three halo properties: 1) concentration $c$, 2) spin $λ$, and 3) ellipticity $s$. Although these simulations cover a large volume, superior to any future surveys, we do not detect any effect of neutrinos on the relations $b_1(c)$, $b_1(λ)$ and $b_1(s)$ at fixed halo mass. We further study the dependence of halo properties and environment on neutrinos, finding these quantities to be impacted by neutrino masses at the same level as assembly bias. We find that the effect of neutrinos on spin and shape can be largely attributed to the change in the cold dark matter $σ_8$ in neutrinos simulations, which is not the case for concentration.
