Observational constraints on modified gravity models and the Poincare dodecahedral topology

• Type: Article in International Scientific Journal
• Date: 2006

Authors

bento, mc (Author) Other; bertolami, o (Author) Other; reboucas, mj (Author) Other; santos, nmc (Author) Other

Journal

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

Vol. 73 No. 123520

ISSN: 1550-7998

Publisher: American Physical Society

Indexing

ISI Web of Knowledge - 20 Citations

Scopus - 26 Citations

Scientific classification

FOS: Natural sciences > Physical sciences

Other information

Authenticus ID: P-004-M3T

DOI: 10.1103/physrevd.73.103521

Abstract (EN): We study observational constraints on models that account for the accelerated expansion of the universe via infrared modifications to general relativity, namely, the Dvali-Gabadadze-Porrati braneworld model as well as the Dvali-Turner and Cardassian models. We find that significant constraints can be placed on the parameters of each model using type Ia supernovae data together with the baryon acoustic peak in the large-scale correlation function of the Sloan Digital Sky Survey of luminous red galaxies and the Cosmic Microwave Background Radiation shift parameter data. Moreover, by considering the Poincare dodecahedral space as the circles-in-the-sky observable spatial topology, we show that the detection of a such a nontrivial topology would provide relevant additional constraints, particularly on the curvature parameter, for all models.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10