Cosmological consequences of Modified Gravity (MOG)

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.

14 pages, 7 figures. Minor typos corrected. Expanded version of invited talk given at the International Conference on Two Cosmological Models, Universidad Iberoamericana, Ciudad de Mexico, November 17-19, 2010

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Cited by in corpus (4)

• MOG cosmology without dark matter and the cosmological constant
• Modified Gravity or Dark Matter?
• Method of N-body simulation on the MOdified Gravity
• Estimation of xi parameter on the Moffat Gravity