Rastall’s cosmology and its observational constraints

Journal Article · Thu Mar 26 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4913336· OSTI ID:22391032

Fabris, Júulio C.; Piattella, Oliver F.; Rodrigues, Davi C. ^[1]; Daouda, Mahamadou H. ^[2]

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1. Departamento de Física - Universidade Federal do Espirito Santo (Brazil)
2. Université de Niamey (Niger)

The Rastall’s theory is a modification of General Relativity touching one of the cornestone of gravity theory: the conservation laws. In Rastall’s theory, the energy-momentum tensor is not conserved anymore, depending now on the gradient of the Ricci curvature. In this sense, this theory can be seen as a classical implementation of quantum effects in a curved background space-time. We exploit this structure in order to reproduce some results of an effective theory of quantum loop cosmology. Later, we propose a model for the dark sector of the universe. In this case, the corresponding ΛCDM model appears as the only model consistent with observational data.

• OSTI ID: 22391032
• Journal Information: AIP Conference Proceedings, Vol. 1647, Issue 1; Conference: Conference on Cosmology and Gravitation in the Southern Cone, Valparaiso (Chile), 27-31 May 2013; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
CONSERVATION LAWS
COSMOLOGICAL CONSTANT
COSMOLOGICAL MODELS
COSMOLOGY
DIAGRAMS
ENERGY-MOMENTUM TENSOR
GENERAL RELATIVITY THEORY
GRAVITATION
LIMITING VALUES
LOOP QUANTUM GRAVITY
MODIFICATIONS
SPACE-TIME
UNIVERSE