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Neutron Star Equation of State from the Quark Level in Light of GW170817

机译:GW170817的夸克能级中子星状态方程

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摘要

The matter state inside neutron stars (NSs) is an exciting problem in astrophysics, nuclear physics, and particle physics. The equation of state (EOS) of NSs plays a crucial role in the present multimessenger astronomy, especially after the event of GW170817. We propose a new NS EOS, "QMF18," from the quark level, which describes robust observational constraints from a free-space nucleon, nuclear matter saturation, heavy pulsar measurements, and the tidal deformability of the very recent GW170817 observation. For this purpose, we employ the quark mean-field model, which allows us to tune the density dependence of the symmetry energy and effectively study its correlations with the Love number and the tidal deformability. We provide tabulated data for the new EOS and compare it with other recent EOSs from various many-body frameworks.
机译:中子星(NSs)内的物质状态是天体物理学,核物理学和粒子物理学中令人兴奋的问题。 NSs的状态方程(EOS)在当前的多信使天文学中起着至关重要的作用,尤其是在GW170817事件之后。我们从夸克水平提出了一个新的NS EOS,称为“ QMF18”,它描述了来自自由空间核子,核物质饱和度,重脉冲星测量以及最近GW170817观测的潮汐可变形性的稳健观测约束。为此,我们采用了夸克平均场模型,该模型允许我们调整对称能量的密度依赖性,并有效地研究其与洛夫数和潮汐变形能力的相关性。我们为新的EOS提供列表数据,并将其与来自各种多主体框架的其他最新EOS进行比较。

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