Table of Contents
Scholarly Research Exchange
Volume 2008, Article ID 238385, 4 pages
Research Article

Putting Yukawa-Like Modified Gravity (MOG) on the Test in the Solar System

Istituto Nazionale di Fisica Nucleare (INFN)-Sezione di Pisa, 56127 Pisa, Italy

Received 4 September 2008; Revised 13 October 2008; Accepted 10 November 2008

Copyright © 2008 Lorenzo Iorio. 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 deal with a Yukawa-like long-range modified model of gravity (MOG) which recently allowed to successfully accommodate many astrophysical and cosmological features without resorting to dark matter. On Solar System scales, MOG predicts anomalous retrograde secular precessions of the planetary longitudes of the perihelia ϖ. Their existence has been put on the test here by taking the ratios of the observationally estimated Pitjeva's corrections to the standard Newtonian/ Einsteinian perihelion precessions for different pairs of planets. It turns out that MOG, in the present form which turned out to be phenomenologically successful on astrophysical scales, is ruled out at more than 3σ level in the Solar System. If and when other teams of astronomers will independently estimate their own corrections to the usual precessions of the perihelia, it will be possible to repeat such a test.