Averaging inhomogeneities in scalar-tensor cosmology
General Relativity and Quantum Cosmology
2009-10-16 v2 Cosmology and Nongalactic Astrophysics
Abstract
The backreaction of inhomogeneities on the cosmic dynamics is studied in the context of scalar-tensor gravity. Due to terms of indefinite sign in the non-canonical effective energy tensor of the Brans-Dicke-like scalar field, extra contributions to the cosmic acceleration can arise. Brans-Dicke and metric f(R) gravity are presented as specific examples. Certain representation problems of the formalism peculiar to these theories are pointed out.
Cite
@article{arxiv.0906.5429,
title = {Averaging inhomogeneities in scalar-tensor cosmology},
author = {Vincenzo Vitagliano and Stefano Liberati and Valerio Faraoni},
journal= {arXiv preprint arXiv:0906.5429},
year = {2009}
}
Comments
Comments and references added. 14 pages