Gravitational time delay of light for various models of modified gravity
Abstract
We reexamined the gravitational time delay of light, allowing for various models of modified gravity. We clarify the dependence of the time delay (and induced frequency shift) on modified gravity models and investigate how to distinguish those models, when light propagates in static spherically symmetric spacetimes. Thus experiments by radio signal from spacecrafts at very different distances from Sun and future spaceborne laser interferometric detectors could be a probe of modified gravity in the solar system.
 Publication:

Physics Letters B
 Pub Date:
 March 2008
 DOI:
 10.1016/j.physletb.2008.02.006
 arXiv:
 arXiv:0710.0477
 Bibcode:
 2008PhLB..661...78A
 Keywords:

 04.80.Cc;
 04.50.+h;
 95.30.Sf;
 95.36.+x;
 Experimental tests of gravitational theories;
 Gravity in more than four dimensions KaluzaKlein theory unified field theories;
 alternative theories of gravity;
 Relativity and gravitation;
 Dark energy;
 General Relativity and Quantum Cosmology;
 Astrophysics;
 High Energy Physics  Theory
 EPrint:
 10 pages, 2 figures