Several observations of high-mass neutron stars (NSs), as well as the first historic detection of the binary neutron star merger GW170817, have delivered stringent constraints on the equation of state (EoS) of cold and dense matter. Recent studies suggest that, in order to simultaneously accommodate a 2M_⊙ NS and the upper limit on the compactness, the pressure has to swiftly increase with density and the corresponding speed of sound likely exceeds the conformal limit. In this work, we employ a unified description of hadron-quark matter, the hybrid quark-meson-nucleon (QMN) model, to investigate the EoS under NS conditions. We show that the dynamical confining mechanism of the model plays an important role in explaining the observed properties of NSs.

对高质量中子星（NSs）的一些观测，以及对二元中子星合并GW170817的首次历史探测，已经对冷物质和致密物质的状态方程（EoS）提出了严格的约束。最近的研究表明，为了同时容纳2中号_⊙ NS和紧凑性的上限，则压力必须迅速随密度增加和声音的对应速度可能超过所述保形的限制。在这项工作中，我们采用强子夸克物质的统一描述，即混合夸克-介子-核子（QMN）模型，来研究NS条件下的EoS。我们表明该模型的动态约束机制在解释观察到的NSs的性质中起着重要作用。