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; Caballero, R. Nicolas11,14; Yuan, Jianping10; Xu YH(徐永华)9 |
刊名 | RESEARCH IN ASTRONOMY AND ASTROPHYSICS |
出版日期 | 2023-07-01 |
卷号 | 23期号:7 |
ISSN号 | 1674-4527 |
关键词 | (stars:) pulsars: general gravitational waves methods: statistical methods: observational |
DOI | 10.1088/1674-4527/acdfa5 |
产权排序 | 第7完成单位 |
文献子类 | Article |
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. |
学科主题 | 天文学 ; 射电天文学 ; 恒星与银河系 |
URL标识 | 查看原文 |
出版地 | 20A DATUN RD, CHAOYANG, BEIJING, 100101, PEOPLES R CHINA |
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[2020SKA0120100] ; National Natural Science Foundation of China[12041303, 12250410246] ; CAS-MPG LEGACY project ; Max-Planck Partner Group |
版本 | 出版稿 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/26141] |
专题 | 云南天文台_射电天文研究组 |
通讯作者 | Lee, Kejia |
作者单位 | 1.National Astronomical Observatory, Chinse Academy of Sciences, Beijing 100101, China; 2.Australia Telescope National Facility, CSIRO Space and Astronomy, P.O. Box 76, Epping NSW 1710, Australia 3.State Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, China; 4.Shanghai Astronomical Observatory, Chinese Academy of Sciences, Shanghai 200030, China; 5.Beijing Laser Acceleration Innovation Center, Huairou, Beijing 101400, China; 6.Key Laboratory of Radio Astronomy and Technology, Chinese Academy of Sciences, Beijing 100101, China; 7.National Time Service Center, Chinese Academy Of Sciences, Xi'an 710600, China; 8.Institute of Optoelectronic Technology, Lishui University, Lishui 323000, China; 9.Yunnan Astronomical Observatories, Chinese Academy of Sciences, Kunming 650216, China; 10.Xinjiang Astronomical Observatory, Chinese Academy of Sciences, Urumqi 830011, 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). |
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). |
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). |
入库方式: OAI收割
来源:云南天文台
其他版本
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。