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Introduction to the Brans-Dicke gravity

Grant number: 11/00358-7
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): March 01, 2011
Effective date (End): December 31, 2012
Field of knowledge:Physical Sciences and Mathematics - Physics
Principal Investigator:Julio Marny Hoff da Silva
Grantee:Luís Rodolfo dos Santos Filho
Home Institution: Faculdade de Engenharia (FEG). Universidade Estadual Paulista (UNESP). Campus de Guaratinguetá. Guaratinguetá , SP, Brazil

Abstract

Scalar-tensor theories of gravitation have great appreciation for the community academic in the sixties, when the first version was established.In this theory, a scalar field has a dynamic that affects the structure of spacetime.The Brans-Dicke theory was first proposed as an alternative to general relativity, however, require testing in the solar systema lower limit of the Brans-Dicke parameter is around 4000, as a result ended up putting the theory into sensitive positions. On the other hand, an analysis of the dynamics of the scalar field of Brans-Dicke in a cosmological context presents a clear-cut result: the usual general relativity is an attractor of a natural gravitation of Brans-Dicke cosmology evolved, ie,the dynamics of the scalar field is gradually suppressed. In this sense, a result negative with respect to tests in the solar system is indeed expected.The student has developed so far fully its activities concerning the scientific initiation scholarship ca FAPESP as a project on gravitational waves.Now we propose the study of gravitation of Brans-Dicke always seeking a better way ing student on gravitation itself. We believe that the study of such a generalization of general relativity, and provide a better perspective on the area in question, allows a better understanding of gravitation, as well as their own general relativity itself.

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