Population properties and multimessenger prospects of neutron star–black hole mergers following GWTC-3
Population properties and multimessenger prospects of neutron star–black hole mergers following GWTC-3
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GWTC-3 后中子星与黑洞合并的族特性和多信使前景
DOI：
10.1093/mnras/stac3052
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发表时间：
2022
影响因子：
4.8
通讯作者：
Vitale, Salvatore
中科院分区：
文献类型：
--
作者：
Biscoveanu, Sylvia;Landry, Philippe;Vitale, Salvatore
在引力波中检测到的中子星-黑洞（NSBH）合并有可能揭示超新星物理学，致密物质状态方程以及为其潜在的电磁对应物提供动力的天体物理过程。我们使用迄今为止在引力波中检测到的四个候选NSBH事件的总体，其中虚警率≤1 yr− 1，以限制这些系统的质量和自旋分布以及多信使前景。我们发现NSBHs中的黑洞质量和无量纲自旋都小于黑洞双星中的黑洞。我们还发现证据表明，在NSBHs中，质量最大的中子星和质量最小的黑洞之间存在质量差，可信度为98.6%。使用由引力波数据而不是二元模拟驱动的方法，我们发现在引力波中可检测到的NSBH合并中只有不到14%会有电磁对应物。虽然推断存在的质量差距和分数的源与对应物依赖于事件的选择和源分类的先验知识，NSBHs中的黑洞具有较低的质量和较小的自旋参数比黑洞双星的结论是鲁棒的。最后，我们提出了一种方法的多信使分析的NSBH合并的基础上的非检测的电磁对应物，并得出结论，即使在最乐观的情况下，中子星星的状态方程，可以得到与多信使NSBH检测的约束是没有竞争力的引力波测量的潮汐在二进制中子星星合并和无线电和X射线脉冲星观测。
Neutron star–black hole (NSBH) mergers detected in gravitational waves have the potential to shed light on supernova physics, the dense matter equation of state, and the astrophysical processes that power their potential electromagnetic counterparts. We use the population of four candidate NSBH events detected in gravitational waves so far with a false alarm rate ≤1 yr−1to constrain the mass and spin distributions and multimessenger prospects of these systems. We find that the black holes in NSBHs are both less massive and have smaller dimensionless spins than those in black hole binaries. We also find evidence for a mass gap between the most massive neutron stars and least massive black holes in NSBHs at 98.6-per cent credibility. Using an approach driven by gravitational-wave data rather than binary simulations, we find that fewer than 14 per cent of NSBH mergers detectable in gravitational waves will have an electromagnetic counterpart. While the inferred presence of a mass gap and fraction of sources with a counterpart depend on the event selection and prior knowledge of source classification, the conclusion that the black holes in NSBHs have lower masses and smaller spin parameters than those in black hole binaries is robust. Finally, we propose a method for the multimessenger analysis of NSBH mergers based on the non-detection of an electromagnetic counterpart and conclude that, even in the most optimistic case, the constraints on the neutron star equation of state that can be obtained with multimessenger NSBH detections are not competitive with those from gravitational-wave measurements of tides in binary neutron star mergers and radio and X-ray pulsar observations.