Asymptotic tails of massive gravitons in light of pulsar timing array observations

We demonstrate that the asymptotic tails of massive gravitons, present in both massive theories of gravity and effectively in extra-dimensional scenarios, can potentially contribute to gravitational waves with very long wavelengths. However, their impact on recent pulsar timing array observations is expected to be relatively small, predominantly consisting of radiation emitted by black holes in our region of the Milky Way.