Conformal frames and D-dimensional gravity

Details Conformal frames and D-dimensional gravity Conformal frames and D-dimensional gravity

2003-10-27

arxiv.org/abs/gr-qc/0310112v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

20 pages, to be published in: Proceedings of the 18th Course of the School on Cosmology and Gravitation: The Gravitational Con

Scientific paper

We review some results concerning the properties of static, spherically symmetric solutions of multidimensional theories of gravity: various scalar-tensor theories and a generalized string-motivated model with multiple scalar fields and fields of antisymmetric forms associated with p-branes. A Kaluza-Klein type framework is used: there is no dependence on internal coordinates but multiple internal factor spaces are admitted. We discuss the causal structure and the existence of black holes, wormholes and particle-like configurations in the case of scalar vacuum with arbitrary potentials as well as some observational predictions for exactly solvable systems with p-branes: post-Newtonian coefficients, Coulomb law violation and black hole temperatures. Particular attention is paid to conformal frames in which the theory is initially formulated and which are used for its comparison with observations; it is stressed that, in general, these two kinds of frames do not coincide.

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