论文标题
由于二进制中子星的准全面关系引起的系统错误及其对无偏模选择的纠正
Systematic errors due to quasi-universal relations in binary neutron stars and their correction for unbiased model selection
论文作者
论文摘要
中子核心中密集核物质的状态方程（EOS）的推断是中子星的X射线和重力波观测的主要科学目标。特别是，重力波观测提供了对中子星芯中散装物质特性的独立探测，然后可以将其与理论得出的状态方程进行比较。在本文中，我们量化了由EOS独立\ emph {quasi-Universal关系}应用的系统误差}在估计中子星潮汐变形的估计中，而在重力波测量中进行了半径，并引入了一种策略，以校正地下室中的系统偏置的策略。我们将这种方法应用于预期的模拟事件人群，以后对当前探测器的未来升级和地面观测值的下一代升级。我们表明，我们的方法可以准确地纠正由中子恒星的质量拉迪乌斯曲线中的近似普遍关系产生的系统偏见。使用模拟人群的质量和半径的后验分布，我们以良好的精度推断了基础EOS。我们的方法恢复了使用普遍关系在重力波观测中使用普遍关系来快速贝叶斯模型选择密集物质EOS的可能性。
Inference of the equation-of-state (EoS) of dense nuclear matter in neutron-star cores is a principal science goal of X-ray and gravitational-wave observations of neutron stars. In particular, gravitational-wave observations provide an independent probe of the properties of bulk matter in neutron star cores that can then be used to compare with theoretically derived equations of state. In this paper, we quantify the systematic errors arising from the application of EoS-independent \emph{quasi-universal relations} in the estimation of neutron star tidal deformabilities and radii from gravitational-wave measurements and introduce a strategy to correct for the systematic biases in the inferred radii. We apply this method to a simulated population of events expected to be observed by future upgrades of current detectors and the next-generation of ground-based observatories. We show that our approach can accurately correct for the systematic biases arising from approximate universal relations in the mass-radius curves of neutron stars. Using the posterior distributions of the mass and radius for the simulated population we infer the underlying EoS with a good degree of precision. Our method revives the possibility of using the universal relations for rapid Bayesian model selection of dense matter EoS in gravitational-wave observations.
