Gravitational-wave standard siren and cosmology

被引:5
|
作者
Zhao Wen [1 ,2 ]
机构
[1] Univ Sci & Technol China, Chinese Acad Sci, Dept Astron, CAS Key Lab Res Galaxies & Cosmol, Hefei 230026, Anhui, Peoples R China
[2] Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China
关键词
gravitational waves; compact binary coalescence; cosmological parameter;
D O I
10.1360/SSPMA2018-00098
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The discoveries of gravitational-wave (GW) event GW170817, caused by the coalescence of binary neutron-star, as well as the electromagnetic counterparts in multi-frequency bands, mark the coming of multimessenger GW astronomy. By observing the GW waveform of compact binary coalescence, one can independently determine its luminosity distance, which indicates that this kind of GW sources can be treated as "standard sirens" to study the expansion history of the Universe. This provides a novel method for the research of cosmology. In this article, we introduce the basic principle of GW sources as "standard sirens", and focus on various methods to determine the distance and redshift of GW events. We also discuss the detection capabilities of constraining cosmological parameters for (second-generation and third-generation) ground-based GW detectors and space-based GW detectors. In particular, we investigate the potential constraints on the Hubble constant and equation-of-state of dark energy.
引用
收藏
页数:17
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