Alternatives to quintessence model building

• Tipo: Artigo em Revista Científica Internacional
• Data: 2003

Autores

Avelino, PP (Autor) FCUP; Beca, LMG (Autor) Outra; de Carvalho, JPM (Autor) FCUP; Martins, CJAP (Autor) Outra; Pinto, P (Autor) Outra

Revista

Título: Physical Review D: Particles and fields

Vol. 67

ISSN: 0556-2821

Editora: American Physical Society

Indexação

ISI Web of Knowledge - 62 Citações

Scopus - 91 Citações

Classificação Científica

FOS: Ciências exactas e naturais > Física

Outras Informações

ID Authenticus: P-000-J18

DOI: 10.1103/physrevd.67.023511

Abstract (EN): We discuss the issue of toy model building for the dark energy component of the universe. Specifically, we consider two generic toy models recently proposed as alternatives to quintessence models, respectively known as Cardassian expansion and the Chaplygin gas. We show that the former is entirely equivalent to a class of quintessence models. We determine the observational constraints on the latter, coming from recent supernovae results and from the shape of the matter power spectrum. As expected, these restrict the model to a behavior that closely matches that of a standard cosmological constant Lambda.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 8