Continuum dynamics and the electromagnetic field in the scalar ether theory of gravitation

Abstract

An alternative, scalar theory of gravitation has been proposed, based on a mechanism/interpretation of gravity as being a pressure force: Archimedes' thrust. In it, the gravitational field affects the physical standards of space and time, but motion is governed by an extension of the relativistic form of Newton's second law. This implies Einstein's geodesic motion for free particles only in a constant gravitational field. In this work, equations governing the dynamics of a continuous medium subjected to gravitational and non-gravitational forces are derived. Then, the case where the non-gravitational force is the Lorentz force is investigated. The gravitational modification of Maxwell's equations is obtained under the requirement that a charged continuous medium, subjected to the Lorentz force, obeys the equation derived for continuum dynamics under external forces. These Maxwell equations are shown to be consistent with the dynamics of a "free" photon, and thus with the geometrical optics of this theory. However, these equations do not imply local charge conservation, except for a constant gravitational field. Keywords: Alternative theories of gravitation; preferred reference frame; curved spacetime; Maxwell equations; charge conservation

arXiv comment33 pages. Published version is Open Access, see DOI

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Cited by in corpus (6)

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• An analytical model for the Maxwell radiation field in an axially symmetric galaxy
• Towards testing a dark matter candidate that emerges from the scalar ether theory
• Progress in evaluating a possible electromagnetic interaction energy in a gravitational field