Disentangling Multiple Stochastic Gravitational Wave Background Sources in PTA Datasets

Understand

With strong evidence of a common-spectrum stochastic process in the most recent datasets from the NANOGrav Collaboration, the European Pulsar Timing Array (PTA), Parkes PTA, and the International PTA, it is crucial to assess the effects of the several astrophysical and cosmological sources that could contribute to the stochastic gravitational wave background (GWB).

• Using the same dataset creation and injection techniques as in Pol et al.
• (2021), we assess the separability of multiple GWBs by creating single and multiple GWB source datasets.
• We search for these injected sources using Bayesian PTA analysis techniques to assess recovery and separability of multiple astrophysical and cosmological backgrounds.