论文标题
基于晶格QCD热力学的模型中双星溶液的可能性
The possibility of twin star solutions in a model based on lattice QCD thermodynamics
论文作者
论文摘要
紧凑型恒星的性质，尤其是在受晶格QCD热力学约束的有效模型中研究了双星溶液的存在。该模型在大型重骨密度下进行了修改，以结合各种一阶相变到Quarks阶段的各种场景。这是通过匹配状态袋模型方程的两个不同变体来实现的，以估算袋模型参数在第二个中子星的出现中的作用。将中子恒星的产生序列与天体物理观测值和引力波分析的恒星质量，半径和潮汐变形性的现代限制进行了比较。发现大多数可能的场景都不利于强烈的相过渡到夸克物质，并且不支持第二个中子恒星的猜想。
The properties of compact stars and in particular the existence of twin star solutions are investigated within an effective model that is constrained by lattice QCD thermodynamics. The model is modified at large baryon densities to incorporate a large variety of scenarios of first order phase transitions to a phase of deconfined quarks. This is achieved by matching two different variants of the bag model equation of state, in order to estimate the role of the Bag model parameters on the appearance of a second family of neutron stars. The produced sequences of neutron stars are compared with modern constrains on stellar masses, radii, and tidal deformability from astrophysical observations and gravitational wave analyses. It is found that most of the possible scenarios disfavor a strong phase transition to quark matter and do not support the conjecture of a second family of neutron stars.
