Can Galactic Observations Be Explained by a Relativistic Gravity Theory?

Abstract

We consider the possibility of an alternative gravity theory explaining the dynamics of galactic systems without dark matter. From very general assumptions about the structure of a relativistic gravity theory we derive a general expression for the metric to order $(v/c{)}^2$. This allows us to compare the predictions of the theory with various experimental data: the Newtonian limit, light deflection and retardation, rotation of galaxies and gravitational lensing. Our general conclusion is that the possibility for any gravity theory to explain the behaviour of galaxies without dark matter is rather improbable.

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References in corpus (3)

• Possible Gravitational Microlensing of a Star in the Large Magellanic Cloud
• Running Coupling Constants, Newtonian Potential and non localities in the Effective Action
• Open Questions in Classical Gravity

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