Field-theory interpretation of the gravitational interaction in electrodynamics

The theory of gravitational interaction in classical electrodynamics on the base of suggested earlier minimal relativistic model of gravitation is developed. The system of gauge-invariant equations of coupled electromagnetic and gravitational fields is obtained and their common energy-momentum tensor is constructed by means of a variational principle. It is shown, that in the conditions of the existing resonant relation 2 : 3 of orbital and daily Mercury rotation the tidal forces cause the regular perihelion shift of this planet in observable direction forward on a movement course