NANOGrav 15年数据集：对来自单个超大质量黑洞双星的引力波的贝叶斯上限
高能天体物理现象
2023-07-26 v1 广义相对论与量子宇宙学
摘要
基于脉冲星计时阵列数据分析，近期已报告了低频随机引力波背景的证据。此类背景最可能的源是超大质量黑洞双星群体，其中最响亮的个体可能在这些数据集中被单独探测到。在此我们展示在NANOGrav 15年数据集中对单个超大质量黑洞双星的搜寻。我们引入了若干新技术，提升了分析的效率和建模精度。该搜寻发现了两个候选信号的微弱证据，一个引力波频率约为 4 nHz，另一个在 170 nHz。当背景模型中包含Hellings-Downs相关时，低频候选的显著性大幅降低。高频候选因缺乏合理的宿主星系、发现此类源的天体物理先验几率极低，且其主要支持来自一颗具有 commensurate 双星周期的脉冲星而被排除。由于未发现来自单个双星系统的确凿证据，我们对这类系统所发射引力波的应变振幅给出了上限。
引用
@article{arxiv.2306.16222,
title = {The NANOGrav 15-year Data Set: Bayesian Limits on Gravitational Waves from Individual Supermassive Black Hole Binaries},
author = {Gabriella Agazie and Akash Anumarlapudi and Anne M. Archibald and Zaven Arzoumanian and Paul T. Baker and Bence Bécsy and Laura Blecha and Adam Brazier and Paul R. Brook and Sarah Burke-Spolaor and Robin Case and J. Andrew Casey-Clyde and Maria Charisi and Shami Chatterjee and Tyler Cohen and James M. Cordes and Neil Cornish and Fronefield Crawford and H. Thankful Cromartie and Kathryn Crowter and Megan DeCesar and Paul B. Demorest and Matthew C. Digman and Timothy Dolch and Brendan Drachler and Elizabeth C. Ferrara and William Fiore and Emmanuel Fonseca and Gabriel Freedman and Nathaniel Garver-Daniels and Peter Gentile and Joseph Glaser and Deborah Good and Kayhan Gültekin and Jeffrey Hazboun and Sophie Hourihane and Ross Jennings and Aaron D. Johnson and Megan Jones and Andrew R. Kaiser and David Kaplan and Luke Zoltan Kelley and Matthew Kerr and Joey Key and Nima Laal and Michael Lam and William G. Lamb and T. Joseph W. Lazio and Natalia Lewandowska and Tingting Liu and Duncan R. Lorimer and Jing Santiago Luo and Ryan S. Lynch and Chung-Pei Ma and Dustin Madison and Alexander McEwen and James W. McKee and Maura McLaughlin and Natasha McMann and Bradley W. Meyers and Patrick M. Meyers and Chiara M. F. Mingarelli and andrea mitridate and priya natarajan and Cherry Ng and David Nice and Stella Koch Ocker and Ken Olum and Timothy T. Pennucci and Benetge Perera and Polina Petrov and Nihan Pol and Henri A. Radovan and Scott Ransom and Paul S. Ray and Joseph Romano and Shashwat C. Sardesai and Ann Schmiedekamp and Carl Schmiedekamp and Kai Schmitz and Brent J. Shapiro-Albert and Xavier Siemens and Joseph Simon and Magdalena Siwek and Ingrid Stairs and Dan Stinebring and Kevin Stovall and Abhimanyu Susobhanan and Joseph Swiggum and Jacob Taylor and Stephen Taylor and Jacob E. Turner and Caner Unal and Michele Vallisneri and Rutger van Haasteren and Sarah J. Vigeland and Haley M. Wahl and Caitlin Witt and Olivia Young},
journal= {arXiv preprint arXiv:2306.16222},
year = {2023}
}
备注
23 pages, 13 figures, 2 tables. Accepted for publication in Astrophysical Journal Letters as part of Focus on NANOGrav's 15-year Data Set and the Gravitational Wave Background. For questions or comments, please email [email protected]