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Dark energy and F(R) theories: theoretical and observacional aspects

Grant number: 11/13018-0
Support Opportunities:Scholarships in Brazil - Post-Doctorate
Effective date (Start): December 01, 2011
Effective date (End): October 31, 2012
Field of knowledge:Physical Sciences and Mathematics - Astronomy
Principal Investigator:Jose Ademir Sales de Lima
Grantee:Francisco Ernandes Matos Costa
Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil


The present project is part of multiple efforts that are being carried out by different groups in order to understand the mysteries that are behind cosmic acceleration. The cause of this acceleration constitutes the main open problem in the cosmology field and can be the result of the existence of an unknown cosmic component (dark energy) or of the modification of gravity on large scales. In this regard, it is important to analyze and to distinguish possible mechanisms responsible for cosmic acceleration. This project aims at investigating and comparing theoretical aspects of models dark energy and modified gravity as well as possible correlations between them. Moreover, in order to test the observacional viability of the cosmological scenarios that will be investigated, we also will use current type Ia supernovae, cosmic microwave background and baryonic acoustic oscillations data. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
COSTA, F. E. M.; ALCANIZ, J. S.; JAIN, DEEPAK. Interacting model for the cosmological dark sector. Physical Review D, v. 85, n. 10, . (11/13018-0)
GRAEF, L. L.; COSTA, F. E. M.; LIMA, J. A. S.. On the equivalence of Lambda(t) and gravitationally induced particle production cosmologies. Physics Letters B, v. 728, p. 400-406, . (11/13018-0, 04/13668-0, 12/09380-8)
LIMA, J. A. S.; BASILAKOS, S.; COSTA, F. E. M.. New cosmic accelerating scenario without dark energy. Physical Review D, v. 86, n. 10, . (11/13018-0, 04/13668-0)

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