New Possibilities for Observational Distinction Between Geometrical and Field Gravity Theories

TL;DR

This paper reviews observational tests of gravity, exploring how to distinguish between geometrical and field theories of gravity through experiments and astrophysical observations, highlighting new potential methods.

Contribution

It introduces novel observational approaches to differentiate between general relativity and field gravity theories, emphasizing measurable effects like scalar forces and gravitational radiation.

Findings

Scalar repulsive force influences Newtonian gravity

Post-Newtonian motion reveals differences between theories

Absence of singularities in field gravity models

Abstract

Crucial observational tests of gravity physics are reviewed. Such tests are able to clarify the key question on the nature of gravitational interaction: is gravity the curvature of space? or is gravity a matter field in Minkowski flat space as other physical forces? Up to now all actually performed experiments do not allow to distinguish between these two alternatives in gravity physics. The existence of well-defined positive energy-momentum of the gravity field in Poincare-Feynman approach leads to radical changes in gravity physics and cosmology which may be tested by laboratory experiments and astrophysical observations. New possibilities for observational distinction between geometrical general relativity and field gravity theories are discussed. Among them: the contribution of the scalar repulsive force into Newtonian gravitational interaction, post-Newtonian translational motion of rotating bodies, gravitational deflection of light by small mass bodies, scalar gravitational radiation from spherically pulsating stars, existence of limiting radius, surface, magnetic field for massive bodies and absence of singularities and horizons for relativistic compact objects.