Unification of Gravity and Electromagnetism I: Mach's Principle and Cosmology

TL;DR

This paper explores a unified electrogravity theory based on Mach's principle, predicting phenomena like gravitational lensing, galaxy rotation curves without dark matter, and a flat expanding universe consistent with WMAP data.

Contribution

It formulates a Strong Equivalence Principle for electrogravity, deriving empirical laws and cosmological predictions that unify gravity and electromagnetism.

Findings

Derivation of the Schuster-Blackett law from unified theory

Prediction of galaxy rotation curves without dark matter

Explanation of WMAP data with a single free parameter

Abstract

The phenomenological consequences of unification of Einstein gravity and electromagnetism in an early phase of a Machian universe with a very small and uniform electrical charge density $\rho_q$ are explored. A form of the Strong Equivalence Principle for unified electrogravity is first formulated, and it immediately leads to (i) the empirical Schuster-Blackett law relating the magnetic moments and angular momenta of neutral astronomical bodies, (ii) an analogous relation between the linear acceleration of neutral massive bodies and associated electric fields, (iii) gravitational lensing in excess of Einstein gravity, and, with the additional assumption of scaling, to (iv) the Wesson relation between the angular momentum and the square of the mass of astronomical bodies. Incorporation of Sciama's version of Mach's principle leads to a new post-Newtonian dynamics (in the weak field limit of gravity alone without electromagnetism) that predicts flat rotation curves of galaxies without the need of dark matter haloes. Finally, it is shown that the unified theory with a broken symmetry predicts a flat expanding universe with a cosmological term intimately related to electrogravity unification, and can explain WMAP data with a single free parameter. WMAP data require $\rho_q =6.1\times 10^{-43}$ C/cc which is too small to be detected at