论文标题
模糊的水瓶座：模糊暗物质情景中类似乳白色的系统的演变
Fuzzy Aquarius: evolution of a Milky-way like system in the Fuzzy Dark Matter scenario
论文作者
论文摘要
我们提出了第一个从模糊暗物质（FDM）框架中从水瓶座项目中提取的类似乳白色光环的高分辨率缩放模拟。我们基于schrödinger-Poisson方程的粒子溶液使用N体型Ax-ax-gadget，能够详细介绍结构形成的复杂性，同时跟踪FDM中的量子效应。光环显示一个芯密度曲线，核心大小为几个KPC，FDM质量为$m_χ= 2.5h \ times 10^{ - 22} \ {\ rm ev}/c^2 $。在速度曲线中也观察到扁平化，代表了FDM动力学的独特特征。我们提供了对卫星对卫星的影响的定量分析，这些影响在丰度，质量，距离和速度分布函数及其随着红移的进化。有趣的是，我们表明，尽管在$ z = 0 $处显示出平坦的密度曲线，但在形成时仍未达到孤子地面状态：相反，它们在取决于其质量和地层历史的时间表上渐近地收敛于其。这意味着应在极端谨慎的情况下对当前对FDM质量的限制 - 通过将简单的缩放关系应用于观察到的星系获得，因为单个对象可能会显着偏离预期的渐近行为。
We present the first high-resolution zoom-in simulation of a Milky-way-like halo extracted from the Aquarius Project in the Fuzzy Dark Matter (FDM) framework. We use the N-body code AX-GADGET, based on a particle oriented solution of the Schrödinger-Poisson equations, able to detail the complexity of structure formation while keeping track of the quantum effects in FDM. The halo shows a cored density profile, with a core size of several kpc for a FDM mass of $m_χ=2.5h \times 10^{-22}\ {\rm eV}/c^2$. A flattening is observed also in the velocity profile, representing a distinct feature of FDM dynamics. We provide a quantitative analysis of the impact of fuzziness on satellites in terms of abundance, mass, distance and velocity distribution functions and their evolution with redshift. Very interestingly, we show that all collapsed structures, despite showing a flat density profile at $z=0$, do not reach the solitonic ground-state at the time of formation: on the contrary, they asymptotically converge to it on a timescale that depends on their mass and formation history. This implies that current limits on FDM mass - obtained by applying simple scaling relations to observed galaxies - should be taken with extreme care, since single objects can significantly deviate from the expected asymptotic behavior during their evolution.
