Table of Contents
Journal of Gravity
Volume 2013, Article ID 686950, 4 pages
Research Article

First-Order Light Deflection by Einstein-Strauss Vacuole Method

1Department of Mathematics, University of North Bengal, Siliguri 734 013, India
2Ya.B. Zel’dovich International Center for Astrophysics, BSPU, Ufa 450000, Russia
3Department of Mathematics, University of Salerno, Via Ponte Don Melillo, 84084 Fisciano, Italy

Received 20 February 2013; Accepted 15 July 2013

Academic Editor: Jose Antonio De Freitas Pacheco

Copyright © 2013 Debasish Saha et al. 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.


We resolve here an outstanding problem plaguing conformal gravity in its role in making consistent astrophysical predictions. Though its static spherically symmetric solution incorporates all the successes of Schwarzschild gravity, the fit to observed galactic rotation curves requires , while the observed increase in the Schwarzschild light deflection by galaxies appears to demand . Here we show that, contrary to common knowledge, there is an increase in the Schwarzschild deflection angle in the vicinity of galaxies due purely to the effect of , when the idea of the Einstein-Strauss vacuole model is employed. With the inconsistency now out of the way, conformal gravity should be regarded as a good theory explaining light deflection by galaxies.