论文标题
模糊的暗物质中的孤子芯的振荡和随机步行
Oscillations and Random Walk of the Soliton Core in a Fuzzy Dark Matter Halo
论文作者
论文摘要
模糊的暗物质（FDM）光环由靠近中心的孤子芯和外部区域中的NFW样密度曲线组成。先前的调查发现，孤子核心在光环中心周围表现出时间振荡和随机步行游览。分析了一组数值模拟，我们表明这两种现象都可以理解为波浪干扰的结果 - 在固定潜在的固定潜力中，适当的地面（孤子）状态和激发态的合适叠加，以说明这些现象的主要特征。这种本本征分析可以阐明受到潮汐破坏的卫星光环的演变。随着外晕被剥离，减少了激发态的幅度，基态会绝热地进化。这表明孤子振荡和随机行走偏移减少，这是在推断出恒星加热的限制方面要考虑的效果。
A Fuzzy Dark Matter (FDM) halo consists of a soliton core close to the center and an NFW-like density profile in the outer region. Previous investigations found that the soliton core exhibits temporal oscillations and random walk excursions around the halo center. Analyzing a set of numerical simulations, we show that both phenomena can be understood as the results of wave interference -- a suitable superposition of the ground (solitonic) state and excited states in a fixed potential suffices to account for the main features of these phenomena. Such an eigenmode analysis can shed light on the evolution of a satellite halo undergoing tidal disruption. As the outer halo is stripped away, reducing the amplitudes of the excited states, the ground state evolves adiabatically. This suggests diminished soliton oscillations and random walk excursions, an effect to consider in deducing constraints from stellar heating.
