Generalized Chaplygin gas and cosmic microwave background radiation constraints

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

Authors

Bento, MC (Author) Other; Bertolami, O (Author) Other; Sen, AA (Author) Other

Journal

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

Vol. 67

ISSN: 1550-7998

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 229 Citations

Scopus - 243 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-000-HNC

DOI: 10.1103/physrevd.67.063003

Abstract (EN): We study the dependence of the location of the cosmic microwave background radiation peaks on the parameters of the generalized Chaplygin gas model, whose equation of state is given by p=-A/rho(alpha), where A is a positive constant and 0<alphaless than or equal to1. We find, in particular, that observational data arising from Archeops, BOOMERANG, supernova and high-redshift observations allow constraining significantly the parameter space of the model. Our analysis indicates that the emerging model is clearly distinguishable from the alpha=1 Chaplygin case and the LambdaCDM model.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 5