Abstract
We analyze the observational and theoretical constraints on “Einstein-aether theory,” a generally covariant theory of gravity coupled to a dynamical, unit, timelike vector field that breaks local Lorentz symmetry. The results of a computation of the remaining post-Newtonian parameters are reported. These are combined with other results to determine the joint post-Newtonian, vacuum-Čerenkov, nucleosynthesis, stability, and positive-energy constraints. All of these constraints are satisfied by parameters in a large two-dimensional region in the four-dimensional parameter space defining the theory.
- Received 20 September 2005
DOI:https://doi.org/10.1103/PhysRevD.73.064015
©2006 American Physical Society