比较近期各脉冲星计时阵列关于纳赫兹随机引力波背景的结果
高能天体物理现象
2023-09-06 v1 广义相对论与量子宇宙学
摘要
澳大利亚、中国、欧洲、印度和北美脉冲星计时阵列（PTA）合作组最近以不同显著水平报告了纳赫兹引力波背景（GWB）存在的证据。鉴于每个 PTA 在建模数据时做了不同选择，我们对构成国际脉冲星计时阵列（IPTA）的各 PTA 所报告的 GWB 及单颗脉冲星噪声参数进行了比较。我们表明，尽管建模选择不同，不同 PTA 测得的 GWB 参数无显著差异，在 内一致。对于这些数据分析中包括的大多数脉冲星，其脉冲星噪声参数在不同 PTA 间也是一致的。我们通过为所有脉冲星和 PTA 采用标准化噪声模型来弥合建模选择上的差异，发现在此模型下脉冲星噪声参数的张力有所减小。作为该再分析的一部分，我们通过添加该 PTA 未计时的额外脉冲星来“扩展”每个 PTA 的数据集。在这些扩展下，我们发现对 GWB 振幅的约束更好，且 Hellings and Downs 关联的信噪比更高。这些扩展预示了 IPTA 全数据合并（即 IPTA 数据发布 3）所带来的好处，后者不仅将加入额外脉冲星，还将纳入所有三个 PTA 中任一给定脉冲星被多于一个 PTA 计时时的数据。
引用
@article{arxiv.2309.00693,
title = {Comparing recent PTA results on the nanohertz stochastic gravitational wave background},
author = {The International Pulsar Timing Array Collaboration and G. Agazie and J. Antoniadis and A. Anumarlapudi and A. M. Archibald and P. Arumugam and S. Arumugam and Z. Arzoumanian and J. Askew and S. Babak and M. Bagchi and M. Bailes and A. -S. Bak Nielsen and P. T. Baker and C. G. Bassa and A. Bathula and B. Bécsy and A. Berthereau and N. D. R. Bhat and L. Blecha and M. Bonetti and E. Bortolas and A. Brazier and P. R. Brook and M. Burgay and S. Burke-Spolaor and R. Burnette and R. N. Caballero and A. Cameron and R. Case and A. Chalumeau and D. J. Champion and S. Chanlaridis and M. Charisi and S. Chatterjee and K. Chatziioannou and B. D. Cheeseboro and S. Chen and Z. -C. Chen and I. Cognard and T. Cohen and W. A. Coles and J. M. Cordes and N. J. Cornish and F. Crawford and H. T. Cromartie and K. Crowter and M. Curyło and C. J. Cutler and S. Dai and S. Dandapat and D. Deb and M. E. DeCesar and D. DeGan and P. B. Demorest and H. Deng and S. Desai and G. Desvignes and L. Dey and N. Dhanda-Batra and V. Di Marco and T. Dolch and B. Drachler and C. Dwivedi and J. A. Ellis and M. Falxa and Y. Feng and R. D. Ferdman and E. C. Ferrara and W. Fiore and E. Fonseca and A. Franchini and G. E. Freedman and J. R. Gair and N. Garver-Daniels and P. A. Gentile and K. A. Gersbach and J. Glaser and D. C. Good and B. Goncharov and A. Gopakumar and E. Graikou and J. -M. Grießmeier and L. Guillemot and K. Gültekin and Y. J. Guo and Y. Gupta and K. Grunthal and J. S. Hazboun and S. Hisano and G. B. Hobbs and S. Hourihane and H. Hu and F. Iraci and K. Islo and D. Izquierdo-Villalba and J. Jang and J. Jawor and G. H. Janssen and R. J. Jennings and A. Jessner and A. D. Johnson and M. L. Jones and B. C. Joshi and A. R. Kaiser and D. L. Kaplan and A. Kapur and F. Kareem and R. Karuppusamy and E. F. Keane and M. J. Keith and L. Z. Kelley and M. Kerr and J. S. Key and D. Kharbanda and T. Kikunaga and T. C. Klein and N. Kolhe and M. Kramer and M. A. Krishnakumar and A. Kulkarni and N. Laal and K. Lackeos and M. T. Lam and W. G. Lamb and B. B. Larsen and T. J. W. Lazio and K. J. Lee and Y. Levin and N. Lewandowska and T. B. Littenberg and K. Liu and T. Liu and Y. Liu and A. Lommen and D. R. Lorimer and M. E. Lower and J. Luo and R. Luo and R. S. Lynch and A. G. Lyne and C. -P. Ma and Y. Maan and D. R. Madison and R. A. Main and R. N. Manchester and R. Mandow and M. A. Mattson and A. McEwen and J. W. McKee and M. A. McLaughlin and N. McMann and B. W. Meyers and P. M. Meyers and M. B. Mickaliger and M. Miles and C. M. F. Mingarelli and A. Mitridate and P. Natarajan and R. S. Nathan and C. Ng and D. J. Nice and I. C. Niţu and K. Nobleson and S. K. Ocker and K. D. Olum and S. Osłowski and A. K. Paladi and A. Parthasarathy and T. T. Pennucci and B. B. P. Perera and D. Perrodin and A. Petiteau and P. Petrov and N. S. Pol and N. K. Porayko and A. Possenti and T. Prabu and H. Quelquejay Leclere and H. A. Radovan and P. Rana and S. M. Ransom and P. S. Ray and D. J. Reardon and A. F. Rogers and J. D. Romano and C. J. Russell and A. Samajdar and S. A. Sanidas and S. C. Sardesai and A. Schmiedekamp and C. Schmiedekamp and K. Schmitz and L. Schult and A. Sesana and G. Shaifullah and R. M. Shannon and B. J. Shapiro-Albert and X. Siemens and J. Simon and J. Singha and M. S. Siwek and L. Speri and R. Spiewak and A. Srivastava and I. H. Stairs and B. W. Stappers and D. R. Stinebring and K. Stovall and J. P. Sun and M. Surnis and S. C. Susarla and A. Susobhanan and J. K. Swiggum and K. Takahashi and P. Tarafdar and J. Taylor and S. R. Taylor and G. Theureau and E. Thrane and N. Thyagarajan and C. Tiburzi and L. Toomey and J. E. Turner and C. Unal and M. Vallisneri and E. van der Wateren and R. van Haasteren and A. Vecchio and V. Venkatraman Krishnan and J. P. W. Verbiest and S. J. Vigeland and H. M. Wahl and S. Wang and Q. Wang and C. A. Witt and J. Wang and L. Wang and K. E. Wayt and Z. Wu and O. Young and L. Zhang and S. Zhang and X. -J. Zhu and A. Zic},
journal= {arXiv preprint arXiv:2309.00693},
year = {2023}
}
备注
21 pages, 9 figures, submitted to ApJ