论文标题
扰动QCD和状态的中子星程
Perturbative QCD and the Neutron Star Equation of State
论文作者
论文摘要
我们基于声速模型构建了状态恒星方程（EOS）的物理无形方法，该方程将核理论中的低密度信息和来自扰动QCD（PQCD）的高密度约束连接。使用这种方法，我们研究了PQCD计算对已受天体物理观察限制的NS EOS的影响。我们发现PQCD主要影响EOS，主要超出了NS中实现的密度。此外，我们观察到PQCD和天体物理约束之间的有趣相互作用，而PQCD更喜欢EOS较软的NS，而最近的较好的观察结果表明EOS被僵化。如果重量NS的未来观察结果表明大于13 km的半径，我们将探讨我们发现对PQCD不确定性的敏感性，并研究PQCD的限制能力。
We construct a physics-agnostic approach to the neutron star (NS) equation of state (EoS) based on a sound speed model, which connects both low-density information from nuclear theory and high-density constraints from perturbative QCD (pQCD). Using this approach, we study the impact of pQCD calculations on NS EoS that have been constrained by astrophysical observations. We find that pQCD affects the EoS mainly beyond the densities realized in NS. Furthermore, we observe an interesting interplay between pQCD and astrophysical constraints, with pQCD preferring softer EoS for the heaviest NS while recent NICER observations suggest the EoS to be stiffer. We explore the sensitivity of our findings to pQCD uncertainties and study the constraining power of pQCD if future observations of heavy NS were to suggest radii larger than 13 km.
