Modified Gravitational Theory and Galaxy Rotation Curves

TL;DR

This paper proposes a modified gravitational theory that explains galaxy rotation curves, gravitational lensing, and solar system tests without invoking dark matter, aligning with observations across different scales.

Contribution

It introduces a nonsymmetric gravitational theory that fits galaxy rotation curves and lensing data without dark matter, consistent with solar system tests.

Findings

Fits galaxy rotation curves without dark matter

Explains gravitational lensing without exotic matter

Agrees with solar system and pulsar observations

Abstract

The nonsymmetric gravitational theory predicts an acceleration law that modifies the Newtonian law of attraction between particles. For weak fields a fit to the flat rotation curves of galaxies is obtained in terms of the mass (mass-to-light ratio M/L) of galaxies. The fits assume that the galaxies are not dominated by exotic dark matter. The equations of motion for test particles reduce for weak gravitational fields to the GR equations of motion and the predictions for the solar system and the binary pulsar PSR 1913+16 agree with the observations. The gravitational lensing of clusters of galaxies can be explained without exotic dark matter.