8 papers
Post-Newtonian Global Conservation Laws in the Presence of Sensitive Bodies
Timothy Clifton, Asta Heinesen, Oliver Pitt
The parameterized post-Newtonian (PPN) approach is the state of the art formalism for performing theory independent tests of weak-field gravity, and for constraining possible devia…
Observational Quantities in Quasi-Newtonian Descriptions of Cosmological Space-Times
Asta Heinesen, Davide Fontana, Timothy Clifton
We investigate measures of distance and redshift in cosmological space-times that admit a shear-free foliation, which we henceforth refer to as `quasi-Newtonian'. Space expands iso…
Observational Tests for Distinguishing Classes of Cosmological Models
Asta Heinesen, Timothy Clifton
We investigate observational tests that can be used to distinguish between broad classes of cosmological models. This is achieved using curvature-consistency tests of the Friedmann…
Emergent Cosmological Expansion in Scalar-Tensor Theories of Gravity
Chad Briddon, Timothy Clifton, Pierre Fleury
We consider the emergence of large-scale cosmological expansion in scalar-tensor theories of gravity. This is achieved by modelling sub-horizon regions of space-time as weak-field…
Constraining the Cosmological Evolution of Post-Newtonian Parameters with Gravitational Wave Signals from Compact Binary Inspirals
Oliver Pitt, Timothy Clifton
Gravitational waves from compact binary inspirals offer a new opportunity to constrain the cosmological time dependence of gravitational coupling parameters, due to the high precis…
Gravitational Slip in the Parameterized Post-Newtonian Cosmology
Theodore Anton, Timothy Clifton, Daniel B. Thomas
A key signature of general relativity is that the two scalar potentials and , when expressed in the longitudinal gauge, are equal in the absence of fluids with anisotropic…