2005/09/30 by Brendan Z. Foster, Ted Jacobson · 1 citation
Physics and Astronomy · #gr-qc #astro-ph #hep-th
paper · pdf · doi:10.1103/physrevd.73.064015
published as Phys.Rev. D73 (2006) 064015 · 19 pages; v2: corrected typos
arxiv created 2006/02/08 · arxiv updated 2009/12/01
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-Cerenkov, 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.