Generalized Chaplygin gas, accelerated expansion, and dark-energy-matter unification

• Tipo: Artigo em Revista Científica Internacional
• Data: 2002

Autores

Bento, MC (Autor) Outra; Bertolami, O (Autor) Outra; Sen, AA (Autor) Outra

Revista

Título: Physical Review D - Particles, Fields, Gravitation and Cosmology

Vol. 66

ISSN: 1550-7998

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 1725 Citações

Scopus - 1813 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-000-NBH

DOI: 10.1103/physrevd.66.043507

Abstract (EN): We consider the scenario emerging from the dynamics of a generalized Born-Infeld theory. The equation of state describing this system is given in terms of the energy density rho and pressure p by the relationship p=-A/rho(alpha), where A is a positive constant and 0<alpha <= 1. We discuss the conditions under which homogeneity arises and show that this equation of state describes the evolution of a universe evolving from a phase dominated by nonrelativistic matter to a phase dominated by a cosmological constant via an intermediate period where the effective equation of state is given by p=alpha rho.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5