Forecasting the sensitivity of Pulsar Timing Arrays to gravitational wave backgrounds
arxiv(2024)
摘要
Pulsar Timing Array (PTA) observations hinted towards the existence of a
stochastic gravitational wave background (SGWB) in the nHz frequency band.
Still, the nature of the SGWB signal cannot be confidently inferred from
current data, and the leading explanation invokes mergers of supermassive black
holes. If confirmed, such discovery would not only represent a turning point in
our understanding of astrophysics, but it may severely limit the capability of
searching for additional cosmological sources in the nHz frequency range. In
this work, we build a simple framework to forecast the sensitivity of future
PTA configurations and assess the parameter estimation of SGWB, which could
consist of several contributions. We release the python code fastPTA
implementing this framework and ready to use.
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