论文标题
密集物质方程的相对论描述和与中子星可观察物的兼容性：贝叶斯方法
Relativistic description of dense matter equation of state and compatibility with neutron star observables: a Bayesian approach
论文作者
论文摘要
在贝叶斯方法中研究了与中子星（NS）描述相关的状态核方程（EOS）的一般行为，该贝叶斯方法是基于密度依赖性相对论的核物质均值均值场描述应用于一组模型的贝叶斯方法。 EOS受到基于核饱和特性的约束数量最少，并且从精确的近代到接头到领先顺序（n $^{3} $ LO）计算的低密度纯中子物质EO EOS在手化有效场理论（$χ$ eft）中获得的计算。采用这些最小约束获得的模型参数的后分布来构建各种核物质性能和NS特性的分布，例如半径，潮汐变形，中央能量密度和声音的速度等。我们发现了90％的置信区间（CI），用于允许的NS Mask -rass -radius关系和TIDAIS deformbilities的最新置信度（CI）。观察，没有引用异国情调的自由度。 $ \ sqrt {2/3} $ $ c $的订单中心速度。模型允许的最大中子星质量为2.5 $ m_ \ odot $。
The general behavior of the nuclear equation of state (EOS), relevant for the description of neutron stars (NS), is studied within a Bayesian approach applied to a set of models based on a density dependent relativistic mean field description of nuclear matter. The EOS is subjected to a minimal number of constraints based on nuclear saturation properties and the low density pure neutron matter EOS obtained from a precise next-to-next-to-next-to-leading order (N$^{3}$LO) calculation in chiral effective field theory ($χ$EFT). The posterior distributions of the model parameters obtained under these minimal constraints are employed to construct the distributions of various nuclear matter properties and NS properties such as radii, tidal deformabilites, central energy densities and speeds of sound etc. We found that 90% confidence interval (CI) for allowed NS mass - radius relationship and tidal deformabilites are compatible with GW170817 and recent NICER observations, without invoking the exotic degrees of freedom. A central speed-of-sound of the order of $\sqrt{2/3}$ $c$ is obtained. The maximum neutron star mass allowed by the model is 2.5 $M_\odot$.
