Combining Electromagnetic and Gravitational-Wave Constraints on Neutron-Star Masses and Radii
Combining Electromagnetic and Gravitational-Wave Constraints on Neutron-Star Masses and Radii
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DOI：
10.1103/physrevlett.126.061101
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发表时间：
2021-02-12
影响因子：
8.6
通讯作者：
Han, Sophia
中科院分区：
文献类型：
--
作者：
Al-Mamun, Mohammad;Steiner, Andrew W.;Han, Sophia
我们进行联合贝叶斯推断的中子星的质量和半径的约束GW 170817的基础上，静态低质量的X射线双星（QLMXB），光球半径膨胀的X射线爆发源的观测，和X射线定时观测J 0030 + 0451。对于该数据集，先验分布的形式仍然对后验质量-半径曲线和状态方程（EOS）有影响，但这种影响小于最近单独考虑QLMXB时获得的影响。我们分析了电磁数据的一致性，包括“内在散射”的不确定性的贡献，并发现只有轻微的扩大后验。这表明，引力波和电磁观测的中子星结构提供了一个一致的图片的中子星质量半径曲线和状态方程。
We perform a joint Bayesian inference of neutron-star mass and radius constraints based on GW170817, observations of quiescent low-mass x-ray binaries (QLMXBs), photospheric radius expansion x-ray bursting sources, and x-ray timing observations of J0030 + 0451. With this dataset, the form of the prior distribution still has an impact on the posterior mass-radius curves and equation of state (EOS), but this impact is smaller than recently obtained when considering QLMXBs alone. We analyze the consistency of the electromagnetic data by including an "intrinsic scattering" contribution to the uncertainties, and find only a slight broadening of the posteriors. This suggests that the gravitational-wave and electromagnetic observations of neutron-star structure are providing a consistent picture of the neutron-star mass-radius curve and the EOS.