Revival of the unified dark energy-dark matter model?

• Type: Article in International Scientific Journal
• Date: 2004

Authors

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

Journal

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

Vol. 70 No. 83506

Pages: 083519-1-083519-7

ISSN: 1550-7998

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 244 Citations

Scopus - 239 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-000-8CY

DOI: 10.1103/physrevd.70.083519

Abstract (EN): We consider the generalized Chaplygin gas (GCG) proposal for unification of dark energy and dark matter and show that it admits an unique decomposition into dark energy and dark matter components once phantomlike dark energy is excluded. Within this framework, we study structure formation and show that difficulties associated to unphysical oscillations or blowup in the matter power spectrum can be circumvented. Furthermore, we show that the dominance of dark energy is related to the time when energy density fluctuations start deviating from the linear deltasimilar toa behavior.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7