Hubble parameter estimation via dark sirens with the LISA-Taiji network

• 作者: Renjie Wang Wen-Hong Ruan Qing Yang Zong-Kuan Guo Rong-Gen Cai Bin Hu
• 来源期刊: 国家科学评论（英文版）
• 年，卷（期）: 2022,（2）
• 所属期刊栏目: RESEARCH ARTICLES
• 页码范围: 47-57
• 页数: 11页
• 语种: 英文

摘要

The Hubble parameter is one of the central parameters in modern cosmology,and describes the present expansion rate of the universe.The values of the parameter inferred from late-time observations are systematically higher than those inferred from early-time measurements by about 10％.To reach a robust conclusion,independent probes with accuracy at percent levels are crucial.Gravitational waves from compact binary coalescence events can be formulated into the standard siren approach to provide an independent Hubble parameter measurement.The future space-borne gravitational wave observatory network,such as the LISA-Taiji network,will be able to measure the gravitational wave signals in the millihertz bands with unprecedented accuracy.By including several statistical and instrumental noises,we show that,within a five-year operation time,the LISA-Taiji network is able to constrain the Hubble parameter within 1％accuracy,and possibly beats the scatters down to 0.5％or even better.