Averaging inhomogeneities in scalar–tensor cosmology

2009/06/30 by Vincenzo Vitagliano, Stefano Liberati, Valerio Faraoni
Physics and Astronomy · #Black Holes and Theoretical Physics #Classical mechanics #Cosmology #Cosmology and Gravitation Theories #Dark energy #Formalism (music) #Mathematical physics #Physics #Quantum #Quantum gravity #Quantum mechanics #Scalar (mathematics) #Scalar field #Scalar–tensor theory #Solar and Space Plasma Dynamics #Tensor (intrinsic definition) #Theoretical physics #astro-ph.CO #f(R) gravity #gr-qc

paper · pdf · doi:10.1088/0264-9381/26/21/215005

published as Class.Quant.Grav.26:215005,2009 · Comments and references added. 14 pages

openalex publication_date 2009/10/01 · arxiv created 2009/10/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

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.

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