Strong Constraints on Cosmological Gravity from GW170817 and GRB 170817A.
Physical review letters 119:25 (2017) 251301-251301
Abstract:The detection of an electromagnetic counterpart (GRB 170817A) to the gravitational-wave signal (GW170817) from the merger of two neutron stars opens a completely new arena for testing theories of gravity. We show that this measurement allows us to place stringent constraints on general scalar-tensor and vector-tensor theories, while allowing us to place an independent bound on the graviton mass in bimetric theories of gravity. These constraints severely reduce the viable range of cosmological models that have been proposed as alternatives to general relativistic cosmology.
Noise angular power spectrum of gravitational wave background experiments
Physical Review D American Physical Society 101:12 (2020) 124048
Abstract:We construct a model for the angular power spectrum of the instrumental noise in interferometer networks mapping gravitational wave backgrounds (GWBs) as a function of detector noise properties, network configuration, and scan strategy. We use the model to calculate the noise power spectrum for current and future ground-based experiments, as well as for planned space missions. We present our results in a language similar to that used in cosmic microwave background and intensity mapping experiments, and connect the formalism with the sensitivity curves that are common lore in GWB analyses.
Galaxy morphology rules out astrophysically relevant Hu-Sawicki f (R) gravity
PHYSICAL REVIEW D American Physical Society (APS) 102:10 (2020) ARTN 104060
Growth of massive scalar hair around a Schwarzschild black hole
Physical Review D American Physical Society 100 (2019) 063014
Black hole merger simulations in wave dark matter environments
Physical Review D 107:2 (2023)