Constraints on the hybrid equation of state with a crossover hadron-quark phase transition in the light of GW170817

Constraints on the hybrid equation of state with a crossover hadron-quark phase transition in the light of GW170817
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GW170817对强子-夸克交叉相变混合状态方程的约束

DOI:
10.1103/physrevd.98.083013
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发表时间:
2018-08
期刊:
影响因子:
5
通讯作者:
Zong Hong Shi
Zong Hong Shi
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Li Cheng Ming;Yan Yan;Geng Jin Jun;Huang Yong Feng;Zong Hong Shi

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本文利用最近更新的GW 170817的源性质来约束强子状态方程和夸克状态方程之间的三窗口模型所构造的混合状态方程。其中,强子状态方程采用NL 3 $\omega\rho $模型描述,其对应的纯中子星星(NS)已被GW 170817中的潮汐变形性(TD)约束所排除,夸克状态方程采用2+1 flavors Nambu-Jona-Lasinio(NJL)模型计算.我们还考虑了混合状态方程的其他四个约束条件。结果发现,参数集($B^{\frac{1}{4}},\tilde{\mu},\Gamma$)可以得到很好的约束,表明可能存在内部有交叉的混合星星(HS).文中还给出了九个典型的混合型近地天体双星系统中两星的类型。此外,五个约束条件下的HS不表明一个纯夸克的核心,但在中心的混合相。
In this paper, we use the recent updated source properties of GW170817 to constrain the hybrid equation of state (EOS) constructed by a three-window modeling between the hadronic EOS and quark EOS. Specifically, the hadronic EOS is described by NL3$\omega\rho$ model whose corresponding pure neutron star (NS) is already excluded by the constraint of tidal deformability (TD) from GW170817, and the quark EOS is calculated with 2+1 flavors Nambu-Jona-Lasinio (NJL) model. We also consider other four constraints on the hybrid EOS. As a result, we find the parameter set ($B^{\frac{1}{4}}, \tilde{\mu}, \Gamma$) can be well constrained, indicating the possible existence of the hybrid star (HS) with a crossover inside. The type of the two stars in the binary system for nine representative hybrid EOSs is shown in this paper too. Furthermore, the HSs restricted by five constraints do not suggest a pure quark core but a mixed-phase in center.
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