Einstein-aether gravity: a status report
Abstract
Description
This paper reviews the theory, phenomenology, and observational constraints on the coupling parameters of Einstein-aether gravity, i.e. General Relativity coupled to a dynamical unit timelike vector field. A discussion of open questions concerning both phenomenology and fundamental issues is included.
18 pages, for the proceedings of the conference "From Quantum to Emergent Gravity: Theory and Phenomenology", June 11-15 2007, SISSA; Trieste, Italy; v.2: added brief comments on observability of wave speeds and polarizations, and how neutron star and black hole "sensitivities" might be computed
18 pages, for the proceedings of the conference "From Quantum to Emergent Gravity: Theory and Phenomenology", June 11-15 2007, SISSA; Trieste, Italy; v.2: added brief comments on observability of wave speeds and polarizations, and how neutron star and black hole "sensitivities" might be computed