Solar System experiments do not yet veto modified gravity models

Details Solar System experiments do not yet veto modified gravity models Solar System experiments do not yet veto modified gravity models

2006-07-05

arxiv.org/abs/gr-qc/0607016v1

Phys.Rev. D74 (2006) 023529

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages, latex, submitted to Phys. Rev. D

Scientific paper

10.1103/PhysRevD.74.023529

The dynamical equivalence between modified and scalar-tensor gravity theories is revisited and it is concluded that it breaks down in the limit to general relativity. A gauge-independent analysis of cosmological perturbations in both classes of theories lends independent support to this conclusion. As a consequence, the PPN formalism of scalar-tensor gravity and Solar System experiments do not veto modified gravity, as previously thought.

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