Cosmological consequences of Modified Gravity (MOG)

TL;DR

Modified Gravity (MOG) offers an alternative to dark matter by explaining cosmological observations through a field theory with variable gravitational parameters, matching key data like CMB and supernovae.

Contribution

This paper introduces MOG as a field theory that reproduces cosmological observations without dark matter, including a novel acceleration law and predictions for baryonic oscillations.

Findings

MOG matches CMB acoustic spectrum and matter power spectrum observations.

MOG is consistent with Type Ia supernova data.

Predicts detectable baryonic oscillations in future surveys.

Abstract

As an alternative to the LCDM concordance model, Scalar-Tensor-Vector Modified Gravity (MOG) theory reproduces key cosmological observations without postulating the presence of an exotic dark matter component. MOG is a field theory based on an action principle, with a variable gravitational constant and a repulsive vector field with variable range. MOG yields a phenomenological acceleration law that includes strong tensorial gravity partially canceled by a repulsive massive vector force. This acceleration law can be used to model the CMB acoustic spectrum and the matter power spectrum yielding good agreement with observation. A key prediction of MOG is the presence of strong baryonic oscillations, which will be detectable by future surveys. MOG is also consistent with Type Ia supernova data. We also describe on-going research of the coupling between MOG and continuous matter, consistent with the weak equivalence principle and solar system observations.