Gauge choice and geodetic deflection in conformal gravity

Details Gauge choice and geodetic deflection in conformal gravity Gauge choice and geodetic deflection in conformal gravity

2000-06-13

arxiv.org/abs/astro-ph/0006173v1

Gen.Rel.Grav.33:2075-2079,2001

Astronomy and Astrophysics

Astrophysics

5 pages, no figures

Scientific paper

10.1023/A:1013011312648

Conformal gravity has been proposed as an alternative theory of gravity which can account for flat galactic rotation curves without recourse to copious quantities of dark matter. However it was shown that for the usual choice of the metric, the result is catastrophic for null or highly relativistic geodesics, the effect is exactly the opposite yielding an effective repulsion and less deflection in this case. It is the point of this paper, that any result for massive geodesics depends on the choice of conformal gauge, in contradistinction to the case of null geodesics. We show how it is possible to choose the gauge so that the theory is attractive for all geodesics.

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