Constraining Dvali-Gabadadze-Porrati gravity from observational data

Journal Article · Fri May 15 04:00:00 EDT 2009 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.79.103527· OSTI ID:21296331

Junqing, Xia ^[1]

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1. Scuola Internazionale Superiore di Studi Avanzati, Via Beirut 2-4, I-34014 Trieste (Italy)

The accelerating expansion of our Universe at present could be driven by an unknown energy component (dark energy) or a modification of general relativity (modified gravity). In this paper we revisit the constraints on a phenomenological model which interpolates between the pure {lambda}CDM model and the Dvali-Gabadadze-Porrati braneworld model with an additional parameter {alpha}. Combining the cosmic microwave background , baryon acoustic oscillations, and type Ia supernovae, as well as some high-redshift observations, such as the gamma-ray bursts and the measurements of linear growth factors, we obtain the tight constraint on the parameter {alpha}=0.254{+-}0.153 (68% C.L.), which implies that the flat Dvali-Gabadadze-Porrati model is incompatible with the current observations, while the pure {lambda}CDM model still fits the data very well. Finally, we simulate the future measurements with higher precisions and find that the constraint on {alpha} can be improved by a factor of 2 when compared to the present constraints.

• OSTI ID: 21296331
• Journal Information: Physical Review. D, Particles Fields, Journal Name: Physical Review. D, Particles Fields Journal Issue: 10 Vol. 79; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

99 GENERAL AND MISCELLANEOUS
BARYONS
BRANES
COSMIC GAMMA BURSTS
EXPANSION
GENERAL RELATIVITY THEORY
GRAVITATION
GROWTH FACTORS
M-THEORY
MODIFICATIONS
NONLUMINOUS MATTER
OSCILLATIONS
RED SHIFT
RELICT RADIATION
SUPERNOVAE
UNIVERSE