WMAP constraints on the generalized Chaplygin gas model

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

Authors

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

Journal

Title: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

Vol. 575

Pages: 172-180

ISSN: 0370-2693

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 230 Citations

Scopus - 236 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-000-EDN

DOI: 10.1016/jphysletb.2003.08.017

Abstract (EN): The generalized Chaplygin gas (GCG) model explains the recent accelerated expansion of the Universe via an exotic background fluid whose equation of state is given by p = -A/rho(alpha), where A is a positive constant and 0 < alpha less than or equal to 1. The model is an interesting alternative to scenarios involving scalar field potentials, with the ensuing unnatural fine tuning conditions for the underlying particle physics theories. We derive constraints on the parameter space of the model from bounds on the location of the first few peaks and troughs of the cosmic microwave background radiation (CMBR) power spectrum arising from recent WMAP and BOOMERanG data.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 9