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Entropy 2013, 15(1), 162-176; doi:10.3390/e15010162
Review

Conformal Gravity: Dark Matter and Dark Energy

Received: 28 August 2012 / Revised: 17 December 2012 / Accepted: 7 January 2013 / Published: 9 January 2013
(This article belongs to the Special Issue Modified Gravity: From Black Holes Entropy to Current Cosmology)
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Abstract

This short review examines recent progress in understanding dark matter, dark energy, and galactic halos using theory that departs minimally from standard particle physics and cosmology. Strict conformal symmetry (local Weyl scaling covariance), postulated for all elementary massless fields, retains standard fermion and gauge boson theory but modifies Einstein–Hilbert general relativity and the Higgs scalar field model, with no new physical fields. Subgalactic phenomenology is retained. Without invoking dark matter, conformal gravity and a conformal Higgs model fit empirical data on galactic rotational velocities, galactic halos, and Hubble expansion including dark energy.
Keywords: dark matter; dark energy; galactic halos dark matter; dark energy; galactic halos
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Nesbet, R.K. Conformal Gravity: Dark Matter and Dark Energy. Entropy 2013, 15, 162-176.

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