3 papers
astro-ph.CO2025
Ultra-low-frequency gravitational waves from individual supermassive black hole binaries as standard sirens
Ling-Feng Wang, Yue Shao, Si-Ren Xiao +2
Ultra-low-frequency gravitational waves (GWs) generated by individual inspiraling supermassive black hole binaries (SMBHBs) at the centers of galaxies may be detected by pulsar tim…
astro-ph.CO2024
Unraveling the early universe's equation of state and primordial black hole production with PTA, BBN, and CMB observations
Qing-Hua Zhu, Zhi-Chao Zhao, Sai Wang +1
Pulsar timing array (PTA) data releases showed strong evidence for a stochastic gravitational-wave background in the nanohertz band. When the signal is interpreted by a scenario of…
astro-ph.CO2024
FRB dark sirens: Measuring the Hubble constant with unlocalized fast radio bursts
Ze-Wei Zhao, Ji-Guo Zhang, Yichao Li +2
Fast radio bursts (FRBs) can be used to measure cosmological parameters by employing the Macquart relation. However, at present, only a small number of FRB events are localized to…