发表机构
Technische Universität Dortmund; Ludwig-Maximilians-Universität; Technical University of Denmark（多特蒙德工业大学; 慕尼黑大学; 丹麦技术大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究探讨原初黑洞周围轴子云的引力响应，通过一阶微扰理论和类时测地线数值积分，建立轴子波函数微观结构与轨道粒子宏观动力学的对应关系，为探测混合轴子-原初黑洞暗物质提供新框架。
AI 中文摘要
源自原初或天体物理起源的黑洞沉浸于轴子暗物质中，为研究致密天体与超轻标量场的相互作用提供了天然实验室。此前研究主要聚焦于超辐射和视界尺度现象，而周围轴子分布的引力响应却鲜少受到关注。我们研究了沉浸于标量场暗物质晕中的史瓦西和克尔原初黑洞周围的粒子动力学。利用一阶微扰理论，我们表明环境晕会重新分布受引力束缚的轴子云，改变引力原子的特征半径。类时测地线的数值积分显示，最大轨道响应始终出现在该受扰动的半径处，建立了轴子波函数的微观结构与轨道粒子宏观动力学之间的直接对应关系。我们的结果确定了原初黑洞周围标量场暗物质的一种新的纯引力信号，并为探测混合轴子-原初黑洞暗物质场景提供了框架。
英文摘要
Black holes of primordial or astrophysical origin immersed in axion dark matter provide a natural laboratory for exploring the interplay between compact objects and ultralight scalar fields. While previous studies have primarily focused on superradiance and horizon-scale phenomena, the gravitational response of the surrounding axion distribution has received comparatively little attention. We investigate the dynamics of particles orbiting Schwarzschild and Kerr primordial black holes embedded in scalar-field dark matter halos. Using first-order perturbation theory, we show that the ambient halo redistributes the gravitationally bound axion cloud, shifting the characteristic radius of the gravitational atom. Numerical integrations of timelike geodesics demonstrate that the maximum orbital response consistently occurs at this perturbed radius, establishing a direct correspondence between the microscopic structure of the axion wavefunction and the macroscopic dynamics of orbiting particles. Our results identify a new purely gravitational signature of scalar-field dark matter around primordial black holes and provide a framework for probing mixed axion--primordial black hole dark matter scenarios.
CommentsTotal of 6 pages for the main article and 17 pages of supplemental material
