AI 中文总结
该研究针对中子星物态方程普适性假设的潜在失效问题，建立结合分层贝叶斯推断与分段多方参数化的检验框架，利用下一代引力波天文台的双中子星并合数据可检验该普适性。
AI 中文摘要
当前中子星物态方程的推断假设存在一个共同的物态方程描述所有中子星。然而，对致密物质物理的认知不足可能会产生不同的长寿命恒星亚群，这些亚群遵循不同的质量-潮汐形变关系，从而使该假设失效。在本文中，我们证明下一代引力波天文台可将中子星物态方程的普适性从假设转变为可检验的假说。通过将分层贝叶斯推断与中子星物态方程的分段多方参数化相结合，我们建立了一个利用下一代引力波天文台检验物态方程普适性的框架。我们发现，约30个（50个）网络信噪比高于100的响亮双中子星并合事件，足以提供物态方程普适性偏离的有力证据，即便该群体中仅有20%（10%）呈现此处所考虑的代表性非普适性参数化之一。
英文摘要
Current neutron star equation-of-state inferences assume that a common equation of state describes all neutron stars. However, {poorly understood dense-matter physics may give rise to distinct long-lived stellar subpopulations following different mass--tidal-deformability relations, invalidating this assumption. In this Letter, we demonstrate that next-generation gravitational-wave observatories enable neutron star equation-of-state universality to be transformed from an assumption into a testable hypothesis. By combining hierarchical Bayesian inference with a piecewise-polytropic parametrization of the neutron star equation of state, we establish a framework for testing equation-of-state universality with next-generation gravitational-wave observatories. We find that about 30 (50) loud binary neutron star mergers with network SNRs above 100 are sufficient to provide compelling evidence for departures from equation-of-state universality, even if only 20% (10%) of the population exhibits one of the representative non-universality parametrizations considered here.
Comments10 pages, 6 figures
