Constraining the Stochastic Gravitational Wave from String Cosmology with Current and Future High-frequency Detectors

doi:10.3847/1538-4357/ab4e18

CORC > 国家天文台 > 中国科学院国家天文台

	Constraining the Stochastic Gravitational Wave from String Cosmology with Current and Future High-frequency Detectors
	Li,Yufeng 2,3; Fan,Xilong 1; Gou,Lijun 2,3
刊名	The Astrophysical Journal
	2019-12-06
卷号	887 期号:1
关键词	Gravitational wave sources Gravitational wave detectors Observational cosmology
ISSN号	0004-637X
DOI	10.3847/1538-4357/ab4e18
英文摘要	Abstract Pre–Big Bang models in string cosmology predict a relic background of gravitational wave radiation in the early universe. The spectrum of this background shows that the energy density rises rapidly with frequency, which is an interesting target for high-frequency (i.e., kilohertz) detectors. In this paper, we discussed the constraining power of multiple configurations of current and future gravitational wave detector (GWD) networks to the stochastic background predicted in string cosmology. The constraining power is jointly determined by the overlap reduction function and the sensitivity curves of multiple detectors. And we further elaborated on the possible contribution of a future Chinese detector and a kilohertz detector to the constraining power of detector network for stochastic background in string cosmology. Our results show that the detectability of the GWD network for the string cosmology gravitational wave background will improve considerably with the joining of a Chinese detector. This is because a Chinese detector (e.g., located at Wuhan), together with KAGRA, has a better overlap reduction function than the laser interferometer gravitational wave observatory detector pair, and therefore lead to more stringent limits for stochastic background detection. And with ideal overlap reduction function, namely, colocated detectors, a kilohertz sensitivity curve has better performance than previous detectors for stochastic background detection. Finally, the results are compared with the limitations given by the observational constraint of the Big Bang nucleosynthesis bound.
语种	英语
出版者	The American Astronomical Society
WOS记录号	IOP:0004-637X-887-1-AB4E18
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/28658]
专题	中国科学院国家天文台
作者单位	1.School of Physics and Technology, Wuhan University, Wuhan 430072, People's Republic of China; xilong.fan@whu.edu.cn 2.School of Astronomy and Space Science, University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China 3.Key Laboratory for Computational Astrophysics, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People's Republic of China
推荐引用方式 GB/T 7714	Li,Yufeng,Fan,Xilong,Gou,Lijun. Constraining the Stochastic Gravitational Wave from String Cosmology with Current and Future High-frequency Detectors[J]. The Astrophysical Journal,2019,887(1).
APA	Li,Yufeng,Fan,Xilong,&Gou,Lijun.(2019).Constraining the Stochastic Gravitational Wave from String Cosmology with Current and Future High-frequency Detectors.The Astrophysical Journal,887(1).
MLA	Li,Yufeng,et al."Constraining the Stochastic Gravitational Wave from String Cosmology with Current and Future High-frequency Detectors".The Astrophysical Journal 887.1(2019).