NANOGrav 15 年数据集：68 颗毫秒脉冲星的观测与计时
高能天体物理现象
2023-06-29 v1 天体物理仪器与方法
摘要
我们呈现构成北美纳赫兹引力波天文台（NANOGrav）15 年数据集的 68 颗毫秒脉冲星（MSPs）的观测与计时分析。NANOGrav 是一个对低频引力波敏感的脉冲星计时阵列（PTA）实验。这是 NANOGrav 的第五次公开数据发布，包括“窄带”和“宽带”到达时间（TOA）测量及相应的脉冲星计时模型。我们新增了 21 颗 MSP 并将计时基线延长了三年，部分源现已跨度近 16 年。数据在 327 MHz 至 3 GHz 频率间使用阿雷西博天文台、绿岸望远镜和甚大阵列收集，多数源约每月观测一次。与之前数据集相比做出了若干值得注意的方法与流程变更。这些改进了 TOA 数据集的整体质量，并是向新脉冲星计时与 PTA 分析软件包过渡的一部分。我们的数据产品首次附带了用于复现数据缩减、分析与结果的完整软件套件。我们的计时模型包含多种新探测的天测与双星脉冲星参数，包括对脉冲星质量约束的数项显著改进。我们发现 23 颗脉冲星的时间序列含有可探测水平的红噪声，其中 10 颗为新测量。在该数据集中，我们发现了随机引力波背景的证据。
引用
@article{arxiv.2306.16217,
title = {The NANOGrav 15-year Data Set: Observations and Timing of 68 Millisecond Pulsars},
author = {Gabriella Agazie and Md Faisal Alam and Akash Anumarlapudi and Anne M. Archibald and Zaven Arzoumanian and Paul T. Baker and Laura Blecha and Victoria Bonidie and Adam Brazier and Paul R. Brook and Sarah Burke-Spolaor and Bence Bécsy and Christopher Chapman and Maria Charisi and Shami Chatterjee and Tyler Cohen and James M. Cordes and Neil J. Cornish and Fronefield Crawford and H. Thankful Cromartie and Kathryn Crowter and Megan E. DeCesar and Paul B. Demorest and Timothy Dolch and Brendan Drachler and Elizabeth C. Ferrara and William Fiore and Emmanuel Fonseca and Gabriel E. Freedman and Nate Garver-Daniels and Peter A. Gentile and Joseph Glaser and Deborah C. Good and Kayhan Gültekin and Jeffrey S. Hazboun and Ross J. Jennings and Cody Jessup 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 Anastasia Kuske and Nima Laal and Michael T. Lam and William G. Lamb and T. Joseph W. Lazio and Natalia Lewandowska and Ye Lin and Tingting Liu and Duncan R. Lorimer and Jing Luo and Ryan S. Lynch and Chung-Pei Ma and Dustin R. Madison and Kaleb Maraccini and Alexander McEwen and James W. McKee and Maura A. McLaughlin and Natasha McMann and Bradley W. Meyers and Chiara M. F. Mingarelli and Andrea Mitridate and Cherry Ng and David J. Nice and Stella Koch Ocker and Ken D. Olum and Elisa Panciu and Timothy T. Pennucci and Benetge B. P. Perera and Nihan S. Pol and Henri A. Radovan and Scott M. Ransom and Paul S. Ray and Joseph D. Romano and Laura Salo and Shashwat C. Sardesai and Carl Schmiedekamp and Ann Schmiedekamp and Kai Schmitz 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 Abhimanyu Susobhanan and Joseph K. Swiggum and Stephen R. Taylor and Jacob E. Turner and Caner Unal and Michele Vallisneri and Sarah J. Vigeland and Haley M. Wahl and Qiaohong Wang and Caitlin A. Witt and Olivia Young},
journal= {arXiv preprint arXiv:2306.16217},
year = {2023}
}
备注
90 pages, 74 figures, 6 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]