自引力超轻暗物质核心的集体激发

IF 5 2区 物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS
Luca Salasnich , Alexander Yakimenko
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引用次数: 0

摘要

超轻玻色子暗物质的一个显著特征是,它能够在星系晕的中心形成一种密集、静止的玻色-爱因斯坦凝聚体。在这项工作中,我们通过在一个完全自洽的引力框架内数值求解Bogoliubov-de Gennes方程来研究这些核心的内部动力学,同时考虑了引力势扰动和局部自相互作用。我们证明了孤子核支持一个定义良好的集体模式的离散谱。这些振荡表征了地核对扰动的线性响应,并可能影响各种动力学过程。我们还讨论了这些激发在星系尺度上的潜在天体物理意义。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Collective excitations of self-gravitating ultralight dark matter cores
A distinctive feature of ultralight bosonic dark matter is its ability to form a Bose–Einstein condensate with a dense, stationary configuration at the center of galactic halos. In this work, we investigate the internal dynamics of such cores by numerically solving the Bogoliubov–de Gennes equations within a fully self-consistent gravitational framework, accounting for both gravitational potential perturbations and local self-interactions. We demonstrate that the solitonic core supports a discrete spectrum of well-defined collective modes. These oscillations characterize the linear response of the core to perturbations and may influence various dynamical processes. We also discuss potential astrophysical implications of these excitations on galactic scales.
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来源期刊
Physics of the Dark Universe
Physics of the Dark Universe ASTRONOMY & ASTROPHYSICS-
CiteScore
9.60
自引率
7.30%
发文量
118
审稿时长
61 days
期刊介绍: Physics of the Dark Universe is an innovative online-only journal that offers rapid publication of peer-reviewed, original research articles considered of high scientific impact. The journal is focused on the understanding of Dark Matter, Dark Energy, Early Universe, gravitational waves and neutrinos, covering all theoretical, experimental and phenomenological aspects.
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