A Quasar-based Supermassive Black Hole Binary Population Model: Implications for the Gravitational Wave Background

@article{CaseyClyde2022AQS,
  title={A Quasar-based Supermassive Black Hole Binary Population Model: Implications for the Gravitational Wave Background},
  author={J. Andrew Casey-Clyde and Chiara M. F. Mingarelli and Jenny E. Greene and Kris Pardo and Morgan Na{\~n}ez and Andy D. Goulding},
  journal={The Astrophysical Journal},
  year={2022},
  volume={924}
}
The nanohertz gravitational wave background (GWB) is believed to be dominated by GW emission from supermassive black hole binaries (SMBHBs). Observations of several dual-active galactic nuclei (AGN) strongly suggest a link between AGN and SMBHBs, given that these dual-AGN systems will eventually form bound binary pairs. Here we develop an exploratory SMBHB population model based on empirically constrained quasar populations, allowing us to decompose the GWB amplitude into an underlying… 

Consistency of the Parkes Pulsar Timing Array Signal with a Nanohertz Gravitational-wave Background

Pulsar timing array experiments have recently reported strong evidence for a common-spectrum stochastic process with a strain spectral index consistent with that expected of a nanohertz-frequency

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