New Graviton Mass Bound from Binary Pulsars

Shao, Lijing

In Einstein's general relativity, gravity is mediated by a massless metric field. The extension of general relativity to consistently include a mass for the graviton has profound implications for gravitation and cosmology. I will talk about the new constraints on the mass term for the linearized Fierz-Pauli theory and cosmological Galileon models with binary pulsars, and the future prospects of the test.