论文标题
在GW190814的背景下的强子夸克相变
Hadron-Quark phase transition in the context of GW190814
论文作者
论文摘要
在密度依赖性相对论平均场模型（DD-RMF）内计算中子星的性质。研究了向夸克物质的相变，并使用矢量增强袋模型（VBAG）系统地计算混合恒星物质。对于纯耐足相位的DD-LZ1和DD-LMF参数集的最大质量与DD-LZ1和DD-RMF参数集的最大质量约为2.55 $ m _ {\ odot} $，使用Gibbs和Maxwell Construction，Hadron-Quark混合相的最大质量为2 $ M _ {\ odot} $。 Hybrid EOS在1.4 $ M _ {\ odot} $，$λ_{1.4} $中的潮汐变形性与麦克斯韦（Maxwell）构造的纯耐足EOS保持不变，但随着GIBBS构建的中性星质量的增加而降低。尽管纯强生物质EOS满足了最近观察到的GW190814数据的质量约束，这意味着僵硬的中子星EOS EOS，但强子Quark Quark相跃迁满足了最近观察结果GW170817的约束。因此，我们不能排除GW190814中次级对象作为中子星的可能性，其相变向夸克物质，使得满足2 $ m _ {\ odot} $最大质量限制。
The properties of the neutron stars are calculated for the hadronic matter within the density-dependent relativistic mean-field model (DD-RMF). The phase transition to the quark matter is studied and the hybrid star matter properties are systematically calculated using the Vector-Enhanced Bag model (vBag). The maximum mass of neutron star with DD-LZ1 and DD-RMF parameter sets is found to be around 2.55$M_{\odot}$ for pure hadronic phase and around 2$M_{\odot}$ for hadron-quark mixed phase using both Gibbs and Maxwell construction. The tidal deformability for the hybrid EoS at 1.4$M_{\odot}$, $Λ_{1.4}$, remains unchanged from the pure hadronic EoS with Maxwell construction, but decreases with the increasing neutron star mass for Gibbs construction. While the pure hadron matter EoS satisfies the mass constraint from recently observed GW190814 data, implying a stiff neutron star EoS, the hadron-quark phase transition satisfies the constraints from the recent observations GW170817. Therefore, we cannot exclude the possibility of the secondary object in GW190814 as a neutron star with a phase transition to the quark matter that satisfies the 2$M_{\odot}$ maximum mass limit.
