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Model-independent Curvature Determination from Gravitational-wave Standard Sirens and Cosmic Chronometers
Wei, Jun-Jie1,2
2018-11-20
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume868Issue:1Pages:8
Abstract

The detection of gravitational waves (GWs) provides a direct way to measure the luminosity distance, which enables us to probe cosmology. In this paper, we continue to expand the application of GW standard sirens in cosmology, and propose that the spatial curvature can be estimated in a model-independent way by comparing the distances from future GW sources and current cosmic-chronometer observations. We expect an electromagnetic counterpart of the GW event to give the source redshift, and simulate hundreds of GW data from the coalescence of double neutron stars and black hole-neutron star binaries using the Einstein Telescope as a reference. Our simulations show that, fr(o)m 100 simulated GW events and 31 current cosmic-chronometer measurements, the error of the curvature parameter Omega(K) is expected to be constrained at the level of similar to 0.125. If 1000 GW events were observed, the uncertainty of Omega(K) would be further reduced to similar to 0.040. We also find that adding 50 mock H(z) data points (consisting of 81 cosmic-chronometer data points and 1000 simulated GW events) could result in a much tighter constraint on the zero cosmic curvature, for which Omega(K) = -0.002 +/- 0.028. Compared to some actual model-independent curvature tests involving distances from other cosmic probes, this method using GW data achieves constraints with much higher precision.

Keywordcosmological parameters cosmology: observations gravitational waves
DOI10.3847/1538-4357/aae696
WOS KeywordLUMINOUS RED GALAXIES ; GAMMA-RAY BURSTS ; DARK ENERGY ; HUBBLE CONSTANT ; ACOUSTIC-OSCILLATIONS ; OPEN UNIVERSE ; CONSTRAINTS ; TELESCOPE ; INFLATION ; PARAMETER
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000450221800029
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/20923
Collection中国科学院紫金山天文台
Corresponding AuthorWei, Jun-Jie
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
2.Guangxi Univ, Guangxi Key Lab Relativist Astrophys, Nanning 530004, Peoples R China
Recommended Citation
GB/T 7714
Wei, Jun-Jie. Model-independent Curvature Determination from Gravitational-wave Standard Sirens and Cosmic Chronometers[J]. ASTROPHYSICAL JOURNAL,2018,868(1):8.
APA Wei, Jun-Jie.(2018).Model-independent Curvature Determination from Gravitational-wave Standard Sirens and Cosmic Chronometers.ASTROPHYSICAL JOURNAL,868(1),8.
MLA Wei, Jun-Jie."Model-independent Curvature Determination from Gravitational-wave Standard Sirens and Cosmic Chronometers".ASTROPHYSICAL JOURNAL 868.1(2018):8.
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