发表机构
Universidad Michoacana de San Nicolás de Hidalgo（圣尼古拉斯·德伊达尔戈米却肯大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过动力学弛豫模拟，发现模糊暗物质晕中的颗粒尺度与局部德布罗意波长同数量级且略小，并揭示了核-晕过渡区的非均匀结构，建立了密度涨落与速度场的定量联系。
AI 中文摘要
我们研究了通过动力学弛豫形成的模糊暗物质（FDM）晕中出现的颗粒结构。在系统达到维里化的核-晕结构后，我们将密度场分解为一个光滑的球对称分量和一个包含FDM晕特征干涉图样的残余密度。该残余场的功率谱显示出一个明确的优势尺度，该尺度不同于总密度和光滑核-晕模型的特征尺度。我们将此颗粒尺度与根据系统密度流获得的速度场计算的局部德布罗意波长进行比较。我们发现这两个尺度保持在同一数量级，且颗粒尺度系统性地小于德布罗意波长。德布罗意波长的径向行为还揭示了非均匀的内部结构，它从核心向外递减，并在孤子核心与外晕之间的过渡区域附近达到最小值。这些结果为FDM晕的密度涨落、局部速度场以及核-晕形态之间提供了定量联系。
英文摘要
We study the granular structure that emerges in a Fuzzy Dark Matter (FDM) halo formed through kinetic relaxation. After the system reaches a virialized core-halo structure, we separate the density field into a smooth spherical component and a residual density that contains the interference pattern characteristic of FDM halos. The power spectrum of this residual field shows a well defined dominant scale, different from the characteristic scale of the total density and of the smooth core-halo model. We compare this granular scale with a local de Broglie wave-lenght calculated from the velocity field obtained from the density current of the system. We find that both scales remain of the same order of magnitude, with the granular scale systematically smaller than the de Broglie wavelength. The radial behavior of the de Broglie wavelength also reveals a non-uniform internal structure, it decreases from the core and reaches its minimum near the transition between the solitonic core and the outer halo. These results provide a quantitative connection between density fluctuations, the local velocity field, and the core-halo morphology of FDM halos.
Comments8 pages, 6 figures. Accepted for publication in Revista Mexicana de Fisica
