论文标题
模糊的暗物质和暗物质光环芯
Fuzzy Dark Matter and Dark Matter Halo Cores
论文作者
论文摘要
尽管冷暗物质（CDM）模拟预测中央暗物质尖，其密度为$ρ$（r）$ \ sim $ 1/r观测通常表明具有有限的中心密度$ρ_0$的恒定密度核心，并且在核心半径R $ $ _0 $中的平坦密度$ρ_0$。本文研究了该核心问题问题是否可以通过模糊暗物质（FDM）解决，这是一种假设的粒子，具有大量订单m $ \ $ \ $ 10 $^{ - 22} $ eV，以及在天文学量表上的相应的de broglie波长。我们表明，带有CDM Halo病毒质量的星系m $ _ {vir} \ leq 10^{11} $ m $ _ {\ odot} $遵循两个核心缩放关系。除了众所周知的通用核心柱密度$σ_0\equivρ_0\ times $ r $ _0 $ _0 $ = 75 m $ _ $ _ {\ odot} $ pc $^{ - 2} $ core core radii随病毒质量增加，随着r $ $ _0 \ sim $ _ $ _ $ _ $ _ $ _ {vir}^grandial untial unige unity。使用Schive等人的模拟。 （2014年）我们证明，如果观察到的Galaxy样品量表的病毒质量为M $ _ {vir} \ sim $（1+z）$^{ - 0.4} $，则FDM可以解释R $ _0 $ -m $ $ $ $ _ {vir} $缩放关系。但是，观察到的常数$σ_0$与FDM内核完全不同意，FDM内核的特征是陡峭的依赖$σ_0\ sim $ r $ _0^{ - 3} $，独立于z。现在需要更多的高分辨率模拟来确认Schive等人。模拟和探索唯一的孤子核与周围光环之间的过渡区域。如果这些结果得出，则可以将FDM排除在外，因为观察到的暗物质核心的起源和其他物理过程必须考虑其形成。
Whereas cold dark matter (CDM) simulations predict central dark matter cusps with densities that diverge as $ρ$(r)$\sim$ 1/r observations often indicate constant density cores with finite central densities $ρ_0$ and a flat density distribution within a core radius r$_0$. This paper investigates whether this core-cusp problem can be solved by fuzzy dark matter (FDM), a hypothetical particle with a mass of order m$\approx$10$^{-22}$eV and a corresponding de Broglie wavelength on astrophysical scales. We show that galaxies with CDM halo virial masses M$_{vir} \leq 10^{11}$M$_{\odot}$ follow two core scaling relations. In addition to the well known universal core column density $Σ_0 \equiv ρ_0 \times$r$_0$ = 75 M$_{\odot}$pc$^{-2}$ core radii increase with virial masses as r$_0 \sim$ M$_{vir}^γ$ with $γ$ of order unity. Using the simulations by Schive et al. (2014) we demonstrate that FDM can explain the r$_0$-M$_{vir}$ scaling relation if the virial masses of the observed galaxy sample scale with formation redshift z as M$_{vir}\sim$(1+z)$^{-0.4}$. The observed constant $Σ_0$ is however in complete disagreement with FDM cores which are characterised by a steep dependence $Σ_0 \sim$r$_0^{-3}$, independent of z. More high-resolution simulations are now required to confirm the Schive et al. simulations and explore especially the transition region between the soliton core and the surrounding halo. If these results hold, FDM can be ruled out as the origin of observed dark matter cores and other physical processes are required to account for their formation.
