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arXiv 2501.12031gr-qc
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通过 $f$-模式引力波信号探测暗星参数

Probing Dark Star Parameters Through $f$-Mode Gravitational Wave Signals

Mariachiara Celato, Christian J. Krüger, Kostas D. Kokkotas

AI总结:

本文研究了非旋转暗星的平衡结构,发现暗致密星 $f$-模式振荡的频率和阻尼率可表示为质量、半径和转动惯量的普适函数,并提出一种利用 $f$-模式引力波信号推断暗星物理参数准确值的方案。

摘要:

自相互作用暗物质的理论模型为无碰撞冷暗物质框架内的若干未决问题提供了有前景的解决方案。对于不对称暗物质,这些自相互作用可能促进引力坍缩,从而可能导致主要由暗物质组成的致密天体的形成。通过同时考虑费米子和玻色子状态方程,我们分析了非旋转暗星的平衡结构,检验了其整体性质并将其与重子中子星进行比较。我们证明,暗致密星 $f$-模式振荡的频率和阻尼率可以表示为恒星质量、半径和转动惯量的普适函数。最后,利用 $f$-模式的这种普适性,我们提出了一种方案,旨在从暗致密星的 $f$-模式引力波信号中推断其物理参数的准确值。

英文摘要:

Theoretical models of self-interacting dark matter offer a promising solution to several unresolved issues within the collisionless cold dark matter framework. For asymmetric dark matter, these self-interactions may encourage gravitational collapse, potentially leading to the creation of compact objects primarily composed of dark matter. By considering both fermionic and bosonic equations of state, we analyze the equilibrium structure of non-rotating dark stars, examining their bulk properties and comparing them with baryonic neutron stars. We show that the frequency and damping rate of $f$-mode oscillations of dark compact stars can be expressed in terms of universal functions of stellar mass, radius and moment of inertia. Finally, by employing the universality in the $f$-mode, we propose a scheme to infer accurate values of the physical parameters of dark compact stars from their $f$-mode gravitational wave signal.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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