Generalized Chaplygin gas model: Dark energy - Dark matter unification and CMBR constraints

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

Authors

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

Journal

Title: General Relativity and Gravitation

Vol. 35

Pages: 2063-2069

ISSN: 0001-7701

Publisher: Springer Nature

Indexing

ISI Web of Knowledge - 105 Citations

Scopus - 111 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-000-EKJ

DOI: 10.1023/a:1026207312105

Abstract (EN): The generalized Chaplygin gas (GCG) model allows for an unified description of the recent accelerated expansion of the Universe and the evolution of energy density perturbations. This dark energy - dark matter unification is achieved through an exotic background fluid whose equation of state is given by p = -A/rho(alpha), where A is a positive constant and 0 < α &LE; 1. Stringent constraints on the model parameters can be obtained from recent WMAP and BOOMERanG bounds on the locations of the first few peaks and troughs of the Cosmic Microwave Background Radiation (CMBR) power spectrum as well as SNe Ia data.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7