Searching for the Nano-Hertz Stochastic Gravitational Wave Background with the Chinese Pulsar Timing Array Data Release I
文献类型：期刊论文
| 作者 | Xu, Heng1; Chen, Siyuan13,14; Guo, Yanjun12; Jiang, Jinchen1; Wang, Bojun1; Xu, Jiangwei1,13,14; Xue, Zihan1,13,14; Nicolas Caballero, R.11,14; Yuan, Jianping10 ; Xu, Yonghua9
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| 刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS
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| 出版日期 | 2023-07-01 |
| 卷号 | 23期号:7页码:12 |
| ISSN号 | 1674-4527 |
| 关键词 | (stars:) pulsars: general gravitational waves methods: statistical methods: observational |
| DOI | 10.1088/1674-4527/acdfa5 |
| 通讯作者 | Lee, Kejia(kjlee@pku.edu.cn) |
| 英文摘要 | Observing and timing a group of millisecond pulsars with high rotational stability enables the direct detection of gravitational waves (GWs). The GW signals can be identified from the spatial correlations encoded in the times-of-arrival of widely spaced pulsar-pairs. The Chinese Pulsar Timing Array (CPTA) is a collaboration aiming at the direct GW detection with observations carried out using Chinese radio telescopes. This short article serves as a "table of contents" for a forthcoming series of papers related to the CPTA Data Release 1 (CPTA DR1) which uses observations from the Five-hundred-meter Aperture Spherical radio Telescope. Here, after summarizing the time span and accuracy of CPTA DR1, we report the key results of our statistical inference finding a correlated signal with amplitude log A(c) = -14.4(-2.8)(+1.0) for spectral index in the range of alpha epsilon [-1.8, 1.5] assuming a GW background (GWB) induced quadrupolar correlation. The search for the Hellings-Downs (HD) correlation curve is also presented, where some evidence for the HD correlation has been found that a 4.6 sigma statistical significance is achieved using the discrete frequency method around the frequency of 14 nHz. We expect that the future International Pulsar Timing Array data analysis and the next CPTA data release will be more sensitive to the nHz GWB, which could verify the current results. |
| WOS关键词 | SOLAR-SYSTEM ; SIGNAL ; LIMITS |
| 资助项目 | FAST Key project ; National SKA Program of China[2020SKA0120100] ; National Natural Science Foundation of China[12041303] ; National Natural Science Foundation of China[12250410246] ; CAS-MPG LEGACY project ; Max-Planck Partner Group |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES |
| WOS记录号 | WOS:001021222200001 |
| 资助机构 | FAST Key project ; National SKA Program of China ; National Natural Science Foundation of China ; CAS-MPG LEGACY project ; Max-Planck Partner Group |
| 源URL | [http://ir.xao.ac.cn/handle/45760611-7/5313]  |
| 专题 | 研究单元未命名 |
| 通讯作者 | Lee, Kejia |
| 作者单位 | 1.Chinse Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 2.CSIRO Space & Astron, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia 3.Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 4.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 5.Beijing Laser Accelerat Innovat Ctr, Beijing 101400, Peoples R China 6.Chinese Acad Sci, Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China 7.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 8.Lishui Univ, Inst Optoelect Technol, Lishui 323000, Peoples R China 9.Chinese Acad Sci, Yunnan Astron Observ, Kunming 650216, Peoples R China 10.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Heng,Chen, Siyuan,Guo, Yanjun,et al. Searching for the Nano-Hertz Stochastic Gravitational Wave Background with the Chinese Pulsar Timing Array Data Release I[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2023,23(7):12. |
| APA | Xu, Heng.,Chen, Siyuan.,Guo, Yanjun.,Jiang, Jinchen.,Wang, Bojun.,...&Zhu, Yan.(2023).Searching for the Nano-Hertz Stochastic Gravitational Wave Background with the Chinese Pulsar Timing Array Data Release I.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,23(7),12. |
| MLA | Xu, Heng,et al."Searching for the Nano-Hertz Stochastic Gravitational Wave Background with the Chinese Pulsar Timing Array Data Release I".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 23.7(2023):12. |
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