Characterizing instrumental noise and stochastic gravitational wave signals from combined time-delay interferometry

doi:10.1103/PhysRevD.106.044054

	Characterizing instrumental noise and stochastic gravitational wave signals from combined time-delay interferometry
	Wang, Gang ; Li, Bin 6,7; Xu P(徐鹏); Fan, Xilong 2
刊名	PHYSICAL REVIEW D ; 4
	2022-08
卷号	106 页码:44054
ISSN号	2470-0010
DOI	10.1103/PhysRevD.106.044054
英文摘要	LISA will detect gravitational waves (GWs) in the milli-Hz frequency band in space. Time-delay interferometry (TDI) is developed to suppress laser frequency noise beneath the acceleration noise and optical metrology noise. To identify stochastic GW signals, we need to characterize these noise components entangled in TDI data streams. In this work, we investigate noises characterization by combining the first -generation TDI channels from Michelson and Relay configurations. The Michelson channels are helpful to characterize acceleration noises in the lower frequency band, and the Relay configuration could effectively resolve optical path noises in the higher frequencies. Synergy could be achieved from their combination to determine these instrumental noises. Based on the characterized noises, we further reconstruct the power spectrum of noise in the selected TDI channel. Two cases are performed to characterize the spectrum shape of a stochastic GW signal. For a modeled signal, its parameter(s) could be directly estimated from the TDI data, and its spectrum could be recovered from the inferred values. And for an unexpected signal, its spectrum may be recognized and retrieved from noise-subtracted residual in which its power spectral density surpasses the noise level.
学科主题	Astronomy & Astrophysics ; Physics, Particles & Fields
分类号	二类/Q1
语种	英语
WOS记录号	WOS:000861378300006
资助机构	National Key R&D Program of China [2021YFC2201903, 2020YFC2201400] ; NSFC [12003059, 11933010, 11873097, 11922303]
其他责任者	Wang, G (corresponding author), Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China.
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/90204]
专题	力学研究所_国家微重力实验室
作者单位	1.Wuhan Univ, Sch Phys & Technol, Wuhan 430072, Hubei, Peoples R China 2.Univ Chinese Acad Sci, Hangzhou Inst Adv Study, Hangzhou 310124, Peoples R China 3.Lanzhou Univ, Lanzhou Ctr Theoret Phys, Lanzhou 730000, Peoples R China 4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 5.Univ Sci & Technol China, Hefei 230026, Peoples R China 6.Chinese Acad Sci, Purple Mt Observ, Nanjing 210023, Peoples R China 7.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China
推荐引用方式 GB/T 7714	Wang, Gang,Li, Bin,Xu P,et al. Characterizing instrumental noise and stochastic gravitational wave signals from combined time-delay interferometry[J]. PHYSICAL REVIEW D, 4,2022,106:44054.
APA	Wang, Gang,Li, Bin,徐鹏,&Fan, Xilong.(2022).Characterizing instrumental noise and stochastic gravitational wave signals from combined time-delay interferometry.PHYSICAL REVIEW D,106,44054.
MLA	Wang, Gang,et al."Characterizing instrumental noise and stochastic gravitational wave signals from combined time-delay interferometry".PHYSICAL REVIEW D 106(2022):44054.