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Supermassive binary black hole evolution can be traced by a small SKA pulsar timing array
Feng, Yi; Li, Di; Zheng, Zheng; Tsai, Chao-Wei
2020-07-08
Source PublicationPHYSICAL REVIEW D
ISSN1550-7998
Volume102Issue:2Pages:6
AbstractSupermassive black holes are commonly found in the centers of galaxies and evolve with their hosts. Supermassive binary black holes (SMBBH) are thus expected to exist in close galaxy pairs; however, none has been unequivocally detected. The square kilometer array (SKA) is a multipurpose radio telescope with a collecting area approaching 10(6) square meters, with great potential for detecting nanohertz gravitational waves (GWs). In this paper, we quantify the GW detectability by SKA for a realistic SMBBH population using a pulsar timing array (PTA) technique, and we quantify its impact on revealing SMBBH evolution with redshift for the first time. With only similar to 20 pulsars, a much smaller requirement than in previous work, the SKAPTA is expected to obtain detection within about 5 years of operation and to achieve a detection rate of more than 100 SMBBHs/yr after about 10 years. Although beyond the scope of this paper, we must acknowledge that the presence of persistent red noise will reduce the number of expected detections here. It is thus imperative to understand and mitigate red noise in the PTA data. The GW signatures from a few well-known SMBBH candidates, such as OJ 287, 3C 66B, NGC 5548, and Ark 120, will be detected given the currently best-known parameters of each system. Within 30 years of operation, about 60 individual SMBBH detections with z < 0.05 and more than 10(4) with z < 1 are expected. The detection rate drops precipitately beyond z = 1. The substantial number of expected detections and their discernible evolution with redshift by the SKAPTA will make SKA a significant tool for studying SMBBHs.
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China
DOI10.1103/PhysRevD.102.023014
WOS KeywordGALAXIES ; SEARCH
Language英语
Funding ProjectNational Natural Science Foundation of China (NSFC)[11988101] ; National Natural Science Foundation of China (NSFC)[11725313] ; National Natural Science Foundation of China (NSFC)[11690024] ; National Natural Science Foundation of China (NSFC)[11703036] ; CAS[114-A11KYSB20160008] ; CAS[XDB23000000] ; National Key R&D Program of China[2017YFA0402600]
Funding OrganizationNational Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China ; National Natural Science Foundation of China (NSFC) ; National Natural Science Foundation of China (NSFC) ; CAS ; CAS ; National Key R&D Program of China ; National Key R&D Program of China
WOS Research AreaAstronomy & Astrophysics ; Physics
WOS SubjectAstronomy & Astrophysics ; Physics, Particles & Fields
WOS IDWOS:000546193200005
PublisherAMER PHYSICAL SOC
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Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/82767
Collection中国科学院国家天文台
Corresponding AuthorFeng, Yi; Li, Di
AffiliationChinese Acad Sci, Natl Astron Observ, CAS Key Lab FAST, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Feng, Yi,Li, Di,Zheng, Zheng,et al. Supermassive binary black hole evolution can be traced by a small SKA pulsar timing array[J]. PHYSICAL REVIEW D,2020,102(2):6.
APA Feng, Yi,Li, Di,Zheng, Zheng,&Tsai, Chao-Wei.(2020).Supermassive binary black hole evolution can be traced by a small SKA pulsar timing array.PHYSICAL REVIEW D,102(2),6.
MLA Feng, Yi,et al."Supermassive binary black hole evolution can be traced by a small SKA pulsar timing array".PHYSICAL REVIEW D 102.2(2020):6.
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