Bimetric gravity and “dark matter”

I. T. Drummond
Phys. Rev. D 63, 043503 – Published 22 January 2001
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Abstract

We present a bimetric theory of gravity containing a length scale of galactic size. For distances less than this scale the theory satisfies the standard tests of general relativity. For distances greater than this scale the theory yields an effective gravitational constant much larger than the locally observed value of Newton’s constant. The transition from one regime to the other through the galactic scale can explain the observed rotation curves of galaxies and hence the effects normally attributed to the presence of dark matter. Phenomena on an extragalactic scale such as galactic clusters and the expansion of the universe are controlled by the enhanced gravitational coupling. This provides an explanation of the missing matter normally invoked to account for the observed value of Hubble’s constant in relation to observed matter.

  • Received 18 August 2000

DOI:https://doi.org/10.1103/PhysRevD.63.043503

©2001 American Physical Society

Authors & Affiliations

I. T. Drummond

  • DAMTP, Centre for Mathematical Sciences, University of Cambridge, Wilberforce Road, Cambridge CB3 0WA, England

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Vol. 63, Iss. 4 — 15 February 2001

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