气候变化领域集成服务门户(CCPortal): Prospects for improving cosmological parameter estimation with gravitational-wave standard sirens from Taiji

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DOI	10.1016/j.scib.2020.04.032
	Prospects for improving cosmological parameter estimation with gravitational-wave standard sirens from Taiji
	Zhao Z.-W.; Wang L.-F.; Zhang J.-F.; Zhang X.
发表日期	2020
ISSN	20959273
起始页码	1340
结束页码	1348
卷号	65 期号:16
英文摘要	Taiji, a space-based gravitational-wave observatory, consists of three satellites forming an equilateral triangle with arm length of 3×106 km, orbiting around the Sun. Taiji is able to observe the gravitational-wave standard siren events of massive black hole binary (MBHB) merger, which is helpful in probing the expansion of the universe. In this paper, we preliminarily forecast the capability of Taiji for improving cosmological parameter estimation with the gravitational-wave standard siren data. We simulate five-year standard siren data based on three fiducial cosmological models and three models of MBHB's formation and growth. It is found that the standard siren data from Taiji can effectively break the cosmological parameter degeneracies generated by the cosmic microwave background (CMB) anisotropies data, especially for dynamical dark energy models. The constraints on cosmological parameters are significantly improved by the data combination CMB + Taiji, compared to the CMB data alone. Compared to the current optical cosmological observations, Taiji can still provide help in improving the cosmological parameter estimation to some extent. In addition, we consider an ideal scenario to investigate the potential of Taiji on constraining cosmological parameters. We conclude that the standard sirens of MBHB from Taiji will become a powerful cosmological probe in the future. © 2020 Science China Press
关键词	Cosmological parameter estimation Dark energy Space-based gravitational-wave observatory Standard sirens Taiji
英文关键词	Cosmic ray measurement; Cosmology; Gravitational effects; Gravity waves; Signaling; Sirens; Cosmic microwave backgrounds; Cosmological models; Cosmological parameters; Cosmological probes; Equilateral triangles; Expansion of the universe; Gravitational-wave observatory; Massive black holes; Parameter estimation
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207327
作者单位	Department of Physics, College of Sciences, Northeastern University, Shenyang, 110819, China; Ministry of Education's Key Laboratory of Data Analytics and Optimization for Smart Industry, Northeastern University, Shenyang, 110819, China; Center for High Energy Physics, Peking University, Beijing, 100080, China
推荐引用方式 GB/T 7714	Zhao Z.-W.,Wang L.-F.,Zhang J.-F.,et al. Prospects for improving cosmological parameter estimation with gravitational-wave standard sirens from Taiji[J],2020,65(16).
APA	Zhao Z.-W.,Wang L.-F.,Zhang J.-F.,&Zhang X..(2020).Prospects for improving cosmological parameter estimation with gravitational-wave standard sirens from Taiji.Science Bulletin,65(16).
MLA	Zhao Z.-W.,et al."Prospects for improving cosmological parameter estimation with gravitational-wave standard sirens from Taiji".Science Bulletin 65.16(2020).