论文标题
孤子形成和核心 - 哈洛质量关系：特征态观点
Soliton Formation and the Core-Halo Mass Relation: An Eigenstate Perspective
论文作者
论文摘要
超轻暗物质（ULDM）是一种类似于颗粒质量的轴突状暗物质候选者。 ULDM光晕由球形对称的孤子芯和NFW状裙子组成。我们通过孤子合并模拟Halo创建，并使用这些结果来探索核心质量质量关系。我们计算合并光晕的本征状态，并使用它们来隔离孤子芯并计算其对光晕质量的相对贡献。我们将这种方法比较使用拟合函数来隔离核心，并发现质量差异高达30％。我们分析了三个模拟家族：相等质量的合并，不平等质量合并和具有两步合并历史的光晕。将光环质量设置为模拟中的初始质量不会产生一致的核心关系关系。不包括碰撞“弹出”的材料可产生核心关系，同时合并的斜率为1/3，两步合并的斜率约为0.4。我们的发现表明，ULDM没有通用的核心质量关系，并阐明了先前在文献中报道的核心关系的不同结果。
UltraLight Dark Matter (ULDM) is an axion-like dark matter candidate with an extremely small particle mass. ULDM halos consist of a spherically symmetric solitonic core and an NFW-like skirt. We simulate halo creation via soliton mergers and use these results to explore the core-halo mass relation. We calculate the eigenstates of the merged halos and use these to isolate the solitonic core and calculate its relative contribution to the halo mass. We compare this approach to using a fitting function to isolate the core and find a difference in masses up to 30%. We analyze three families of simulations: equal-mass mergers, unequal-mass mergers, and halos with a two-step merger history. Setting the halo mass to the initial mass in the simulation does not yield a consistent core-halo relationship. Excluding material "ejected" by the collision yields a core-halo relationship with a slope of 1/3 for simultaneous mergers and roughly 0.4 for two-step mergers. Our findings suggest there is no universal core-halo mass relationship for ULDM and shed light on the differing results for the core-halo relationship previously reported in the literature.
