The Lambda CDM limit of the generalized Chaplygin gas scenario

• Type: Article in International Scientific Journal
• Date: 2003

Authors

Avelino, PP (Author) FCUP; Beca, LMG (Author) Other; de Carvalho, JPM (Author) FCUP; Martins, CJAP (Author) Other

Journal

Title: Journal of Cosmology and Astroparticle Physics

Vol. 2003

Pages: 11-15

ISSN: 1475-7516

Publisher: Institute of Physics Publishing

Indexing

ISI Web of Knowledge - 47 Citations

Scopus - 8 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-000-FBP

DOI: 10.1088/1475-7516/2003/09/002

Abstract (EN): We explicitly demonstrate that, contrary to recent claims, the dynamics of a generalized Chaplygin gas model with an equation of state p= -C (where C is a positive constant) is equivalent to that of a standard LambdaCDM model to first order in the metric perturbations. We further argue that the analogy between the two models goes well beyond linear theory and conclude that they cannot be distinguished based on gravity alone.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5