Gravitational wave sensitivity curve of pulsar timing arrays affected by correlated noises

doi:10.1088/1674-4527/20/11/184

	Gravitational wave sensitivity curve of pulsar timing arrays affected by correlated noises
	Liu, Shu 1,2,3; Tong, Ming-Lei 1,2
刊名	RESEARCH IN ASTRONOMY AND ASTROPHYSICS
	2020-11-01
卷号	20 期号:11 页码:10
关键词	gravitational waves pulsars general time ephemerides
ISSN号	1674-4527
DOI	10.1088/1674-4527/20/11/184
英文摘要	The detection of gravitational waves (GWs) by pulsar timing arrays (PTAs) is not only a very important supplementation of the verification of general relativity but also a new window to study the evolution of supermassive binary black holes and the early universe. However, so far the detection sensitivity of PTAs is not good enough to catch signals of GWs due to the disturbance of various noises. In this paper we explore the influences of the correlated noises caused by the reference clock errors and solar system ephemeris errors in pulsar timing on the detection of stochastic gravitational waves background (GWB). We demonstrate the power-law integrated sensitivity curves of GWB detection under the impacts from these correlated noises. From the simulated data, we find that the influence of different reference time-scale is non-negligible, and the influence is even quite huge if one uses a very old version of solar system ephemeris. However, the impact from these correlated noises on the sensitivity curve is very limited for the real observational data released by international pulsar timing arrays (IPTA). We also calculate the signal-to-noise ratios based on the theoretical GW amplitude permitted by observations. Moreover, we study how the detection sensitivity increases with more pulsar number and longer observation.
资助项目	National Natural Science Foundation of China[U1831130] ; National Natural Science Foundation of China[U1531112] ; program of Youth Innovation Promotion Association CAS[2017450]
WOS关键词	SUPERMASSIVE BLACK-HOLES ; BINARY-SYSTEMS ; RADIATION ; LIMITS
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:000593526900001
资助机构	National Natural Science Foundation of China ; National Natural Science Foundation of China ; program of Youth Innovation Promotion Association CAS ; program of Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; program of Youth Innovation Promotion Association CAS ; program of Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; program of Youth Innovation Promotion Association CAS ; program of Youth Innovation Promotion Association CAS ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; program of Youth Innovation Promotion Association CAS ; program of Youth Innovation Promotion Association CAS
内容类型	期刊论文
源URL	[http://210.72.145.45/handle/361003/12098]
专题	中国科学院国家授时中心
通讯作者	Tong, Ming-Lei
作者单位	1.Chinese Acad Sci, Natl Time Ctr, Xian 710600, Peoples R China 2.Chinese Acad Sci, Key Lab Time & Frequency Primary Stand, Xian 710600, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liu, Shu,Tong, Ming-Lei. Gravitational wave sensitivity curve of pulsar timing arrays affected by correlated noises[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2020,20(11):10.
APA	Liu, Shu,&Tong, Ming-Lei.(2020).Gravitational wave sensitivity curve of pulsar timing arrays affected by correlated noises.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,20(11),10.
MLA	Liu, Shu,et al."Gravitational wave sensitivity curve of pulsar timing arrays affected by correlated noises".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 20.11(2020):10.