paper

Illusions of general relativity in Brans-Dicke gravity

arXiv:gr-qc/9902083 · doi:10.1103/PhysRevD.59.084021

Abstract

Contrary to common belief, the standard tenet of Brans-Dicke theory reducing to general relativity when omega tends to infinity is false if the trace of the matter energy-momentum tensor vanishes. The issue is clarified in a new approach using conformal transformations. The otherwise unaccountable limiting behavior of Brans-Dicke gravity is easily understood in terms of the conformal invariance of the theory when the sources of gravity have radiation-like properties. The rigorous computation of the asymptotic behavior of the Brans-Dicke scalar field is straightforward in this new approach.

16 pages, LaTeX, to appear in Physical Review D

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