Speaker
Description
In massive gravity, we expect a modification to the dispersion relation for gravitational waves and the angular correlation in pulsar timing arrays (PTAs) due to the five polarization modes that arise. We consider the lower bound for graviton mass constraints from the dispersion relation for future PTA observations and scrutinze the possibility of detection via the effective overlap reduction function. We find that the predicted overlap reduction function for such a graviton mass lies outside the standard deviation of the observed angular correlation, even in the best case scenario. Future PTA observation campaigns therefore are not able to detect these additional modes of polarization and cannot be effectively used to constrain the graviton mass.
