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Strongly lensed gravitational waves and electromagnetic signals as powerful cosmic rulers
Wei, Jun-Jie1,2; Wu, Xue-Feng1,3,4
2017-12-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume472Issue:3Pages:2906-2912
Abstract

In this paper, we discuss the possibility of using strongly lensed gravitational waves (GWs) and their electromagnetic (EM) counterparts as powerful cosmic rulers. In the EM domain, it has been suggested that joint observations of the time delay (Delta tau) between lensed quasar images and the velocity dispersion (sigma) of the lensing galaxy (i.e. the combination Delta tau/sigma(2)) are able to constrain the cosmological parameters more strongly than Delta tau or sigma(2) separately. Here, for the first time, we propose that this Delta tau/sigma(2) method can be applied to the strongly lensed systems observed in both GW and EM windows. Combining the redshifts, images and sigma observed in the EM domain with the very precise Delta tau derived from lensed GW signals, we expect that accurate multimessenger cosmology can be achieved in the era of third-generation GW detectors. Comparing with the constraints from the Delta tau method, we prove that using Delta tau/sigma(2) can improve the discrimination between cosmological models. Furthermore, we demonstrate that with similar to 50 strongly lensed GW-EM systems, we can reach a constraint on the dark energy equation of state w comparable to the 580 Union2.1 Type Ia supernovae data. Much more stringent constraints on w can be obtained when combining the Delta tau and Delta tau/sigma(2) methods.

Keywordgravitational lensing: strong gravitational waves cosmological parameters dark energy distance scale
DOI10.1093/mnras/stx2210
WOS KeywordBARYON ACOUSTIC-OSCILLATIONS ; EQUATION-OF-STATE ; HUBBLE CONSTANT ; TIME DELAYS ; COSMOLOGICAL CONSTRAINTS ; LENSING SYSTEMS ; GALAXIES ; UNIVERSE ; SUPERNOVAE ; MODEL
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000413088400034
PublisherOXFORD UNIV PRESS
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22782
Collection中国科学院紫金山天文台
Corresponding AuthorWei, Jun-Jie; Wu, Xue-Feng
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
3.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
4.Nanjing Univ, Joint Ctr Particle Nucl Phys & Cosmol, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Wei, Jun-Jie,Wu, Xue-Feng. Strongly lensed gravitational waves and electromagnetic signals as powerful cosmic rulers[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,472(3):2906-2912.
APA Wei, Jun-Jie,&Wu, Xue-Feng.(2017).Strongly lensed gravitational waves and electromagnetic signals as powerful cosmic rulers.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,472(3),2906-2912.
MLA Wei, Jun-Jie,et al."Strongly lensed gravitational waves and electromagnetic signals as powerful cosmic rulers".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 472.3(2017):2906-2912.
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