Using the observed quasar luminosity function, the authors show that quasar-associated black hole mergers can reproduce the NANOGrav gravitational wave background if quasar lifetimes are near 3e7 years and most quasars are merger-triggered binaries.
Quasars have been connected to modeling the GWB in the PTA bands in the past, both directly as well as indirectly
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Can quasars, triggered by mergers, account for NANOGrav's stochastic gravitational wave background?
Using the observed quasar luminosity function, the authors show that quasar-associated black hole mergers can reproduce the NANOGrav gravitational wave background if quasar lifetimes are near 3e7 years and most quasars are merger-triggered binaries.