Forecast for cosmological parameter estimation with gravitational-wave standard sirens from the LISA-Taiji network

• 作者: Ling-Feng Wang Shang-Jie Jin Jing-Fei Zhang Xin Zhang
• 来源期刊: 中国科学：物理学 力学 天文学（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: Article
• 页码范围: 1-13
• 页数: 13页
• 语种: 英文

摘要

LISA and Taiji are expected to form a space-based gravitational-wave (GW) detection network in the future.In this work,we make a forecast for the cosmological parameter estimation with the standard siren observation from the LISA-Taiji network.We simulate the standard siren data based on a scenario with configuration angle of 40° between LISA and Taiji.Three models for the population of massive black hole binary (MBHB),i.e.,pop Ⅲ,Q3d,and Q3nod,are considered to predict the events of MBHB mergers.We find that,based on the LISA-Taiji network,the number of electromagnetic (EM) counterparts detected is almost doubled compared with the case of single Taiji mission.Therefore,the LISA-Taiji network's standard siren observation could provide much tighter constraints on cosmological parameters.For example,solely using the standard sirens from the LISA-Taiji network,the constraint precision of H0 could reach 1.3％.Moreover,combined with the CMB data,the GW-EM observation based on the LISA-Taiji network could also tightly constrain the equation of state of dark energy,e.g.,the constraint precision of w reaches about 4％,which is comparable with the result of CMB+BAO+SN.It is concluded that the GW standard sirens from the LISA-Taiji network will become a useful cosmological probe in understanding the nature of dark energy in the future.