NANOGrav 15年数据集：对新物理信号的搜寻
高能天体物理现象
2023-06-29 v1 宇宙学与河外天体物理
广义相对论与量子宇宙学
高能物理 - 唯象学
摘要
北美纳赫兹引力波天文台（NANOGrav）收集的15年脉冲星计时数据集显示出存在低频引力波（GW）背景的阳性证据。在本文中，我们研究该信号的潜在宇宙学解释，具体包括宇宙暴胀、标量诱导引力波、一级相变、宇宙弦和畴壁。我们发现，除场论起源的稳定宇宙弦外，所有这些模型都能重现观测到的信号。与旋近超大质量黑洞双星（SMBHB）的标准解释相比，许多宇宙学模型似乎提供了更好的拟合，其贝叶斯因子在10到100之间。然而，这些结果强烈依赖于对宇宙SMBHB群体的建模假设，在此阶段不应被视为新物理的证据。此外，我们确定了被排除的参数区域，其中宇宙学源预言的GW信号显著超过NANOGrav信号。这些参数约束与NANOGrav信号的起源无关，并说明脉冲星计时数据提供了一种约束这些模型参数空间的新途径。最后，我们搜寻由超轻暗物质（ULDM）和银河系中暗物质子结构模型产生的确定性信号。我们未发现这两类信号的证据，从而报告了这些模型的更新约束。对于ULDM，这些约束在对电子、缪子或胶子耦合的ULDM上优于扭秤和原子钟约束。
引用
@article{arxiv.2306.16219,
title = {The NANOGrav 15-year Data Set: Search for Signals from New Physics},
author = {Adeela Afzal and Gabriella Agazie and Akash Anumarlapudi and Anne M. Archibald and Zaven Arzoumanian and Paul T. Baker and Bence Bécsy and Jose Juan Blanco-Pillado and Laura Blecha and Kimberly K. Boddy and Adam Brazier and Paul R. Brook and Sarah Burke-Spolaor and Rand Burnette and Robin Case and Maria Charisi and Shami Chatterjee and Katerina Chatziioannou and Belinda D. Cheeseboro and Siyuan Chen and Tyler Cohen and James M. Cordes and Neil J. Cornish and Fronefield Crawford and H. Thankful Cromartie and Kathryn Crowter and Curt J. Cutler and Megan E. DeCesar and Dallas DeGan and Paul B. Demorest and Heling Deng and Timothy Dolch and Brendan Drachler and Richard von Eckardstein and Elizabeth C. Ferrara and William Fiore and Emmanuel Fonseca and Gabriel E. Freedman and Nate Garver-Daniels and Peter A. Gentile and Kyle A. Gersbach and Joseph Glaser and Deborah C. Good and Lydia Guertin and Kayhan Gültekin and Jeffrey S. Hazboun and Sophie Hourihane and Kristina Islo and Ross J. Jennings and Aaron D. Johnson and Megan L. Jones and Andrew R. Kaiser and David L. Kaplan and Luke Zoltan Kelley and Matthew Kerr and Joey S. Key and Nima Laal and Michael T. Lam and William G. Lamb and T. Joseph W. Lazio and Vincent S. H. Lee and Natalia Lewandowska and Rafael R. Lino dos Santos and Tyson B. Littenberg and Tingting Liu and Duncan R. Lorimer and Jing Luo and Ryan S. Lynch and Chung-Pei Ma and Dustin R. Madison and Alexander McEwen and James W. McKee and Maura A. McLaughlin and Natasha McMann and Bradley W. Meyers and Patrick M. Meyers and Chiara M. F. Mingarelli and Andrea Mitridate and Jonathan Nay and Priyamvada Natarajan and Cherry Ng and David J. Nice and Stella Koch Ocker and Ken D. Olum and Timothy T. Pennucci and Benetge B. P. Perera and Polina Petrov and Nihan S. Pol and Henri A. Radovan and Scott M. Ransom and Paul S. Ray and Joseph D. Romano and Shashwat C. Sardesai and Ann Schmiedekamp and Carl Schmiedekamp and Kai Schmitz and Tobias Schröder and Levi Schult and Brent J. Shapiro-Albert and Xavier Siemens and Joseph Simon and Magdalena S. Siwek and Ingrid H. Stairs and Daniel R. Stinebring and Kevin Stovall and Peter Stratmann and Jerry P. Sun and Abhimanyu Susobhanan and Joseph K. Swiggum and Jacob Taylor and Stephen R. Taylor and Tanner Trickle and Jacob E. Turner and Caner Unal and Michele Vallisneri and Sonali Verma and Sarah J. Vigeland and Haley M. Wahl and Qiaohong Wang and Caitlin A. Witt and David Wright and Olivia Young and Kathryn M. Zurek},
journal= {arXiv preprint arXiv:2306.16219},
year = {2023}
}
备注
74 pages, 31 figures, 4 tables; published 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]