Mimicking dark matter through a non-minimal gravitational coupling with matter

• Tipo: Artigo em Revista Científica Internacional
• Data: 2010

Autores

Bertolami, O (Autor) FCUP; Paramos, J (Autor) Outra

Revista

Título: Journal of Cosmology and Astroparticle Physics

Vol. 2010

Páginas: 009-009

ISSN: 1475-7516

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 89 Citações

Scopus - 78 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-003-8R7

DOI: 10.1088/1475-7516/2010/03/009

Abstract (EN): In this study one resorts to the phenomenology of models endowed with a non-minimal coupling between matter and geometry, in order to develop a mechanism through which dynamics similar to that due to the presence of dark matter is generated. As a first attempt, one tries to account for the flattening of the galaxy rotation curves as an effect of the non-(covariant) conservation of the energy-momentum tensor of visible matter. Afterwards, one assumes instead that this non-minimal coupling modifies the scalar curvature in a way that can be interpreted as a dark matter component (albeit with negative pressure). It is concluded that it is possible to mimic known dark matter density profiles through an appropriate power-law coupling f(2) = (R/R-0)(n), with a negative index n - a fact that reflects the dominance of dark matter at large distances. The properties of the model are extensively discussed, and possible cosmological implications are addressed.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 38