ON THE COSMOLOGY OF MASSIVE VECTOR-FIELDS WITH SO(3) GLOBAL SYMMETRY

• Tipo: Artigo em Revista Científica Internacional
• Data: 1993

Autores

BENTO, MC (Autor) Outra; Bertolami, O (Autor) Outra; MONIZ, PV (Autor) Outra; MOURAO, JM (Autor) Outra; SA, PM (Autor) Outra

Revista

Título: Classical and Quantum Gravity

Vol. 10

Páginas: 285-298

ISSN: 0264-9381

Editora: Institute of Physics Publishing

Indexação

ISI Web of Knowledge - 76 Citações

Scopus - 74 Citações

Outras Informações

ID Authenticus: P-001-ND0

DOI: 10.1088/0264-9381/10/2/010

Abstract (EN): We study the dynamics of flat Friedmann-Robertson-Walker (FRW) cosmologies in the presence of a triplet of massive vector fields with SO(3) global symmetry. We find an E3-symmetric ansatz for the vector fields that is compatible with the E3-invariant FRW metric and propose a method to make an invariant ansatz for more general cosmological models. We use the techniques of dynamical systems to study qualitatively the behaviour of the model and find, in particular, that the effective equation of state of the system changes gradually from a radiation-dominated to a matter-dominated form and that the scale of the transition depends on the mass of the gauge fields.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 14