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arXiv 2409.04526astro-ph.HEgr-qcnucl-th
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利用中子星内部原初黑洞的轨道约束核物质状态方程

Constraining the nuclear equation of state from orbits of primordial black holes inside neutron stars

Anna Chen, Juan Diego DelPrado, Thomas W. Baumgarte, Stuart L. Shapiro

AI总结:

本文提出通过观测中子星内部原初黑洞偏心轨道进动引发的引力波拍频,为核物质状态方程提供互补约束并打破参数简并。

摘要:

由于缺乏地面实验数据,我们对密度达到乃至超过核密度的高密度物质行为的最佳约束来自中子星观测。当前约束包括基于恒星质量、半径和潮汐可变形性测量得到的结果。本文探讨原初黑洞(如果存在)在中子星内部的轨道如何能够为核物质状态方程(EOS)提供互补约束。具体而言,我们考虑一组候选EOS,为这些EOS构建中子星模型,并计算原初黑洞在这些恒星内部的轨道。我们讨论偏心轨道的近星点进动(即轨道进动)如何在所发射的引力波信号中产生拍频现象。观测到这一拍频频率,不仅可以约束核EOS并打破其他约束可能产生的简并,还能提供关于宿主恒星的信息。

英文摘要:

Lacking terrestrial experimental data, our best constraints on the behavior of matter at high densities up to and above nuclear density arise from observations of neutron stars. Current constraints include those based on measurements of stellar masses, radii, and tidal deformabilities. Here we explore how orbits of primordial black holes - should they exist - inside neutron stars could provide complementary constraints on the nuclear equation of state (EOS). Specifically, we consider a sample of candidate EOSs, construct neutron star models for these EOSs, and compute orbits of primordial black holes inside these stars. We discuss how the pericenter advance of eccentric orbits, i.e. orbital precession, results in beat phenomena in the emitted gravitational wave signal. Observing this beat frequency could constrain the nuclear EOS and break possible degeneracies arising from other constraints, as well as provide information about the host star.

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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