双黑洞参数推断中自旋先验假设的检验及其天体物理意义
Testing Spin Prior Assumptions of Binary Black Hole Parameter Inference and Their Astrophysical Implications
- Lester B. Pearson United World College of the Pacific（莱斯特·B·皮尔逊太平洋联合世界学院）
- Nanyang Normal University（南阳师范学院）
- Zhejiang University of Technology（浙江工业大学）
- Anhui Normal University（安徽师范大学）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文通过贝叶斯推断检验三种自旋先验，发现主黑洞不自旋先验被高有效旋进自旋系统数据否定，提出公共包层演化及质量比反转通道可解释这些系统。
AI中文摘要：
随着引力波瞬变目录5.0（GWTC-5.0）中双黑洞（BBH）候选体数量的不断增加，已报道了越来越多具有不同性质的双黑洞系统。在大多数事件的参数估计中，单个自旋受到的约束相对较少。虽然LIGO-Virgo-KAGRA合作组织（LVK）默认采用无信息自旋先验，但一些双星演化场景对成员星自旋有很强的预测。在本工作中，我们对覆盖啁啾质量、质量比和有效旋进自旋（$\mathcal{M}_{\rm c}$-$q$-$\chi_{\rm eff}$）参数空间中广泛性质范围的双黑洞事件子集进行了贝叶斯参数推断。我们考虑了三种不同的自旋先验：LVK自旋先验以及两种天体物理动机先验，分别假设主黑洞不自旋（$\chi_1 = 0$）或次黑洞不自旋（$\chi_2 = 0$）。我们发现，对于几个具有高有效旋进自旋的系统，包括GW190517_055101、GW190412、GW241113_163507和GW231028_153006，数据不支持主黑洞不自旋的先验。我们提出，标准公共包层演化代表了一种有望通过引力波观测进行检验的形成通道，并提出了一种估算通过替代演化通道形成的系统并合率的新方法。我们进一步提出，涉及质量比反转的双星演化可能为这些系统提供一种可能的形成途径。
英文摘要：
With the growing number of binary black hole (BBH) candidates in the Gravitational-Wave Transient Catalog 5.0 (GWTC-5.0), an increasing number of BBH systems with distinct properties have been reported. The individual spins are relatively less constrained in the parameter estimations for most events. While the LIGO-Virgo-KAGRA Collaboration (LVK) adopts a uninformative spin prior by default, some binary evolution scenarios have strong predictions on component spins. In this work, we perform Bayesian parameter inference for a subset of BBH events spanning a broad range of properties in the chirp mass, mass ratio, and effective inspiral spin ($\mathcal{M}_{\rm c}$-$q$-$χ_{\rm eff}$) parameter space. We consider three different spin priors: the LVK spin prior and two astrophysically motivated priors, assuming a non-spinning primary BH ($χ_1 = 0$) or a non-spinning secondary BH ($χ_2 = 0$). We find that the non-spinning primary BH prior is disfavored by the data for several systems with high effective inspiral spins, including GW190517_055101, GW190412, GW241113_163507, and GW231028_153006. We suggest that standard common-envelope evolution represents a promising formation channel that can be tested with gravitational-wave observations, and propose a novel method for estimating the merger rate of systems formed through alternative evolutionary channels. We further suggest that the binary evolution involving mass-ratio reversal may provide a possible formation pathway for these systems.
