Searching for the Nano-Hertz Stochastic Gravitational Wave Background with the Chinese Pulsar Timing Array Data Release I

doi:10.1088/1674-4527/acdfa5

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	Searching for the Nano-Hertz Stochastic Gravitational Wave Background with the Chinese Pulsar Timing Array Data Release I
	Xu, Heng 1; Chen, Siyuan 2,3; Guo, Yanjun 4; Jiang, Jinchen 1; Wang, Bojun 1; Xu, Jiangwei 1,2,3; Xue, Zihan 1,2,3; Nicolas Caballero, R.2,5; Yuan, Jianping6 ; Xu, Yonghua 7; Wang, Jingbo8 ; Hao, Longfei 7; Luo, Jingtao 9; Lee, Kejia 1,2,3,10,11; Han, Jinlin 1; Jiang, Peng 1; Shen, Zhiqiang 12; Wang, Min 6; Wang, Na5 ; Xu, Renxin 2,3,13; Wu, Xiangping 1; Manchester, Richard 14; Qian, Lei 1; Guan, Xin 1; Huang, Menglin 1; Sun, Chun 1; Zhu, Yan1
	2023-07-01
Source Publication	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN	1674-4527
Volume	23 Issue:7 Pages:075024
Contribution Rank	6
Abstract	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.
Keyword	(stars:) pulsars: general gravitational waves methods: statistical methods: observational
DOI	10.1088/1674-4527/acdfa5
Indexed By	SCI
Language	英语
WOS Keyword	SOLAR-SYSTEM ; SIGNAL ; LIMITS
Funding Project	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 Research Area	Astronomy & Astrophysics
WOS Subject	Astronomy & Astrophysics
WOS ID	WOS:001021222200001
Publisher	NATL ASTRONOMICAL OBSERVATORIES, CHIN ACAD SCIENCES
Funding Organization	FAST Key project ; National SKA Program of China ; National Natural Science Foundation of China ; CAS-MPG LEGACY project ; Max-Planck Partner Group
Citation statistics	Cited Times:701[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.xao.ac.cn/handle/45760611-7/5314
Collection	射电天文研究室_脉冲星研究团组科研仪器设备产出_我台利用FAST观测数据文章
Corresponding Author	Lee, Kejia
Affiliation	1.Chinse Acad Sci, Natl Astron Observ, Beijing 100101, Peoples R China 2.Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China 3.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China 4.Max Planck Inst Radioastron, D-53121 Bonn, Germany 5.Hellen Open Univ, Sch Sci & Technol, Patras 26335, Greece 6.Chinese Acad Sci, Xinjiang Astron Observ, Urumqi 830011, Peoples R China 7.Chinese Acad Sci, Yunnan Astron Observ, Kunming 650216, Peoples R China 8.Lishui Univ, Inst Optoelect Technol, Lishui 323000, Peoples R China 9.Chinese Acad Sci, Natl Time Serv Ctr, Xian 710600, Peoples R China 10.Chinese Acad Sci, Key Lab Radio Astron & Technol, Beijing 100101, Peoples R China 11.Beijing Laser Accelerat Innovat Ctr, Beijing 101400, Peoples R China 12.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China 13.Peking Univ, Sch Phys, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 14.CSIRO Space & Astron, Australia Telescope Natl Facil, POB 76, Epping, NSW 1710, Australia
Recommended Citation 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):075024.
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),075024.
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):075024.

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