论文标题
用中子星的多通电者数据限制相变的限制
Constraint on phase transition with the multimessenger data of neutron stars
论文作者
论文摘要
中子星（NS）物质的状态方程（EOS）仍然是一个谜。在这项工作中，我们使用重力波数据（GW170817）和Mass-Radius对某些NS（PSR J0030+0451，PSR J0437-4715和4U 1702-429）进行了贝叶斯参数推断，并使用现象构造的EOS构建的EOS模型来搜索潜在的跨订单。我们的现象学EOS模型采用了当前广泛使用的参数化方法的优势，这些方法具有足够的灵活性，可以类似于各种理论EOS模型。我们发现，由于有和没有相变的模型的可比证据，当前的观察数据仍然不足以支持/排除相变。但是，规范$ 1.4 \，m_ \ odot $ ns的批量特性和$2ρ_{\ rm sat} $的压力受到数据的限制，其中$ρ_{\ rm sat} $是核饱和密度。此外，低密度下的强相变是不利的，并且过渡密度的$1σ$下限被限制为$1.84ρ_{\ rm sat} $。
The equation of state (EoS) of the neutron star (NS) matter remains an enigma. In this work we perform the Bayesian parameter inference with the gravitational wave data (GW170817) and mass-radius observations of some NSs (PSR J0030+0451, PSR J0437-4715, and 4U 1702-429) using the phenomenologically constructed EoS models to search for a potential first-order phase transition. Our phenomenological EoS models take the advantages of current widely used parametrizing methods, which are flexible enough to resemble various theoretical EoS models. We find that the current observation data are still not informative enough to support/rule out phase transition, due to the comparable evidences for models with and without phase transition. However, the bulk properties of the canonical $1.4\,M_\odot$ NS and the pressure at around $2ρ_{\rm sat}$ are well constrained by the data, where $ρ_{\rm sat}$ is the nuclear saturation density. Moreover, strong phase transition at low densities is disfavored, and the $1σ$ lower bound of transition density is constrained to $1.84ρ_{\rm sat}$.
