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Scalar–tensor–vector gravity theory
- J. Moffat
- Physics
- 3 June 2005
A covariant scalar–tensor–vector gravity theory is developed which allows the gravitational constant G, a vector field coupling ω and the vector field mass μ to vary with space and time. The…
On groups of automorphisms of operator algebras
- J. Moffat
- MathematicsMathematical Proceedings of the Cambridge…
- 1 March 1977
In section 3 we shall prove the following results: Let G be a separable locally compact abelian group, R a von Neumann algebra acting on a separable Hilbert space, and α a weakly continuous…
The MOG weak field approximation and observational test of galaxy rotation curves
As an alternative to dark matter models, MOdified Gravity (MOG) theory can compensate for dark matter by a covariant modification of Einstein gravity. The theory introduces two additional scalar…
Galaxy Rotation Curves without Nonbaryonic Dark Matter
- J. Brownstein, J. Moffat
- Physics
- 16 June 2005
We apply the modified acceleration law obtained from Einstein gravity coupled to a massive skew-symmetric field Fμνλ to the problem of explaining galaxy rotation curves without exotic dark matter.…
Black holes in modified gravity (MOG)
- J. Moffat
- Physics
- 12 December 2014
The field equations for scalar–tensor–vector gravity (STVG) or modified gravity (MOG) have a static, spherically symmetric black hole solution determined by the mass $$M$$M with two horizons. The…
SUPERLUMINARY UNIVERSE: A POSSIBLE SOLUTION TO THE INITIAL VALUE PROBLEM IN COSMOLOGY
- J. Moffat
- Physics
- 16 November 1992
The spontaneous breaking of local Lorentz invariance in the early Universe, associated with a first order phase transition at a critical time tc, generates a large increase in the speed of light and…
Gravitational solution to the Pioneer 10/11 anomaly
- J. Brownstein, J. Moffat
- Physics
- 6 November 2005
A fully relativistic modified gravitational theory including a fifth force skew-symmetric field is fitted to the Pioneer 10/11 anomalous acceleration. The theory allows for a variation with distance…
Testing Modified Gravity with Globular Cluster Velocity Dispersions
Globular clusters (GCs) in the Milky Way have characteristic velocity dispersions that are consistent with the predictions of Newtonian gravity, and may be at odds with Modified Newtonian Dynamics…
Galaxy cluster masses without non-baryonic dark matter
- J. Brownstein, J. Moffat
- Physics
- 8 July 2005
We apply the modified acceleration law obtained from Einstein gravity coupled to a massive skew symmetric field, Fμνλ, to the problem of explaining X-ray galaxy cluster masses without exotic dark…
The Bullet Cluster 1E0657-558 evidence shows modified gravity in the absence of dark matter
- J. Brownstein, J. Moffat
- Physics
- 6 February 2007
A detailed analysis of the 2006 November 15 data release X-ray surface density Σ-map and the strong and weak gravitational lensing convergence K-map for the Bullet Cluster 1E0657-558 is performed and…
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