Dynamical friction and stellar orbital motion in spiral galaxies with dark matter composed of ultralight bosons in the state of rotating Bose–Einstein condensate (BEC) are studied. It is found that the dynamical friction force is significantly affected by the topological charge of the vortex structure of the BEC core with the strongest effect at distances near the galactic center. It is also shown that the ultralight dark matter self-interaction plays an important role in studying the dynamical friction.

中文翻译：

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旋转超轻暗物质星系核心中的动力学摩擦


本文研究了在旋转玻色-爱因斯坦凝聚态 （BEC） 状态下由超轻玻色子组成的暗物质的螺旋星系中的动力学摩擦和恒星轨道运动。研究发现，BEC 核心涡流结构的拓扑电荷对动摩擦力影响显著，在靠近星系中心的距离处影响最强。研究还表明，超轻暗物质自相互作用在研究动力学摩擦中起着重要作用。