Einstein-aether gravity: theory and observational constraints
Ted Jacobson
TL;DR
This paper reviews Einstein-aether gravity, a modification of general relativity involving a dynamical vector field, and discusses current theoretical insights and observational constraints on its parameters.
Contribution
It provides a comprehensive overview of Einstein-aether theory and summarizes the latest observational bounds on its four coupling parameters.
Findings
Current observational data constrain the coupling parameters.
Theoretical consistency imposes specific conditions on the model.
The theory remains viable within certain parameter ranges.
Abstract
Einstein-aether theory is general relativity coupled to a dynamical unit timelike vector field. A brief review of current theoretical understanding and observational constraints on the four coupling parameters of the theory is given.
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