超大质量黑洞双星种群的响亮尾部：多信使候选体与SKAO展望
The Loud Tail of the Supermassive Black Hole Binary Population: Multimessenger Candidates and Prospects for SKAO
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中文总结 AI 辅助
本研究利用NANOGrav数据拟合的种群模型，发现3C 66B和Mrk 501是突出的引力波单源候选体，并预测SKAO可分辨数十个双星，从而探测双星硬化机制。
中文摘要 AI 辅助
我们评估了电磁波识别出的超大质量黑洞（SMBH）双星候选体是否占据引力波（GW）振幅分布中稀有且高振幅的尾部。利用拟合NANOGrav 15年数据的SMBH双星种群模型，我们发现3C 66B和Mrk 501很可能从引力波背景中脱颖而出，使其成为单源搜索的有前景目标。此外，我们表明单个探测可以探究双星硬化机制，因为具有强环境硬化的模型预测出比纯引力波驱动模型更高数量的可单独分辨双星。应用相同的种群拟合并考虑来自未分辨种群的混淆噪声，我们预测平方千米阵列观测站（SKAO）将分辨出数十个单独双星，其中3C 66B可被稳健探测。
英文摘要
We assess whether electromagnetically identified supermassive black hole (SMBH) binary candidates populate the rare, high-amplitude tail of the gravitational wave (GW) amplitude distribution. Using an SMBH binary population model fitted to the NANOGrav 15-year data, we find that 3C~66B and Mrk~501 are likely to stand out from the GW background, making them promising targets for individual-source searches. Furthermore, we show that individual detections can probe the binary hardening mechanism, as models with strong environmental hardening predict a higher abundance of individually resolvable binaries than purely GW-driven models. Applying the same population fits and accounting for the confusion noise from the unresolved population, we forecast that the Square Kilometre Array Observatory (SKAO) will resolve tens of individual binaries, with 3C~66B robustly detectable.
发表机构
- Laboratory of High Energy and Computational Physics, NICPB（NICPB高能计算物理实验室）
- Tallinn University of Technology（塔林理工大学）
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