论文标题
Lisa-Taiji网络通过黑暗警报器进行哈勃参数估算
Hubble parameter estimation via dark sirens with the LISA-Taiji network
论文作者
论文摘要
哈勃参数是现代宇宙学的中心参数之一，它描述了宇宙的当前膨胀率。从较晚观察结果中推断出的它们的值在系统上高于早期测量值的值约为$ 10 \％$。为了得出强大的结论，具有精度的独立探针在百分比水平上至关重要。来自紧凑型二元聚结的重力波可以在标准警报方法中提出，以提供独立的哈勃参数测量。未来的太空传播引力波动台网络（例如Lisa-Taiji网络）将能够以前所未有的精度来测量Millihertz频段中的重力波信号。通过包含几个统计和仪器噪声，我们表明在5年的运行时间内，Lisa-Taiji网络能够在$ 1 \％$ $准确度以内限制Hubble参数，并可能将散布降低到$ 0.5 \％$甚至更好。
The Hubble parameter is one of the central parameters in modern cosmology, which describes the present expansion rate of the universe. Their values inferred from the late-time observations are systematically higher than those from the early-time measurements by about $10\%$. To come to 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 5 years 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.
