Searching for isotropic stochastic gravitational-wave background in the international pulsar timing array second data release

doi:10.1088/1572-9494/ac7cdf

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	Searching for isotropic stochastic gravitational-wave background in the international pulsar timing array second data release
	Chen, Zu-Cheng ; Wu, Yu-Mei ; Huang, Qing-Guo
刊名	COMMUNICATIONS IN THEORETICAL PHYSICS
	2022
卷号	74 期号:10 页码:105402
关键词	HOLE BINARY-SYSTEMS RADIATION PACKAGE TEMPO2 LIMITS PROBE
ISSN号	0253-6102
DOI	10.1088/1572-9494/ac7cdf
英文摘要	We search for isotropic stochastic gravitational-wave background (SGWB) in the International Pulsar Timing Array second data release. By modeling the SGWB as a power-law, we find very strong Bayesian evidence for a common-spectrum process, and further this process has scalar transverse (ST) correlations allowed in general metric theory of gravity as the Bayes factor in favor of the ST-correlated process versus the spatially uncorrelated common-spectrum process is 30 +/- 2. The median and the 90% equal-tail amplitudes of ST mode are A(ST) = 1.29(-0.44)(+0.51) x 10(-15), or equivalently the energy density parameter per logarithm frequency is Omega(ST)(GW) = 2.31(-1.30)(+2.19) x 10(-9), at frequency of 1 year(-1). However, we do not find any statistically significant evidence for the tensor transverse (TT) mode and then place the 95% upper limits as A(TT) < 3.95 x 10(-15), or equivalently Omega(TT)(GW) < 2.16 x 10(-9), at frequency of 1 year(-1).
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27853]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Beijing Normal Univ, Adv Inst Nat Sci, Zhuhai 519087, Peoples R China 2.[Chen, Zu-Cheng 3.Wu, Yu-Mei 4.Chinese Acad Sci, Inst Theoret Phys, CAS Key Lab Theoret Phys, Beijing 100190, Peoples R China 5.Univ Chinese Acad Sci, Sch Phys Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 6.Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China 7.UCAS, Hangzhou Inst Adv Study, Sch Fundamental Phys & Math Sci, Hangzhou 310024, Peoples R China
推荐引用方式 GB/T 7714	Chen, Zu-Cheng,Wu, Yu-Mei,Huang, Qing-Guo. Searching for isotropic stochastic gravitational-wave background in the international pulsar timing array second data release[J]. COMMUNICATIONS IN THEORETICAL PHYSICS,2022,74(10):105402.
APA	Chen, Zu-Cheng,Wu, Yu-Mei,&Huang, Qing-Guo.(2022).Searching for isotropic stochastic gravitational-wave background in the international pulsar timing array second data release.COMMUNICATIONS IN THEORETICAL PHYSICS,74(10),105402.
MLA	Chen, Zu-Cheng,et al."Searching for isotropic stochastic gravitational-wave background in the international pulsar timing array second data release".COMMUNICATIONS IN THEORETICAL PHYSICS 74.10(2022):105402.