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

被引：1
作者：
Chen, Anna [1 ]
DelPrado, Juan Diego [1 ]
Baumgarte, Thomas W. [1 ]
Shapiro, Stuart L. [2 ,3 ,4 ]
机构：
[1] Bowdoin Coll, Dept Phys & Astron, Brunswick, ME 04011 USA
[2] Univ Illinois, Dept Phys, Urbana, IL 61801 USA
[3] Univ Illinois, Dept Astron, Urbana, IL 61801 USA
[4] Univ Illinois, NCSA, Urbana, IL 61801 USA
来源：
PHYSICAL REVIEW D | 2024年 / 110卷 / 06期
基金：
美国国家科学基金会;
关键词：
OF-STATE; INERTIA; MOMENT; MASSES;
D O I：
10.1103/PhysRevD.110.064066
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
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 contraints, as well as provide information about the host star.
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页数：12
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