Consistency of f(R)=√(R2-R02) gravity with cosmological observations in the Palatini formalism
- 1. Institute for Studies in Theoretical Physics and Mathematics, P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of)
- 2. Department of Physics, Shahid Beheshti University, Evin, Tehran 19839 (Iran, Islamic Republic of)
- 3. Department of Physics, Sharif University of Technology, P.O. Box 11365-9161, Tehran (Iran, Islamic Republic of)
Description
In this work we study the dynamics of the Universe in f(R)=√(R2-R02) modified gravity with the Palatini formalism. We use data from recent observations, such as the supernova type Ia Gold sample and Supernova Legacy Survey data, the size of the baryonic acoustic peak from the Sloan Digital Sky Survey , the position of the acoustic peak from the cosmic microwave background observations, and large-scale structure formation from the 2dFGRS survey, to put constraints on the parameters of the model. To check the consistency of this action, we compare the age of old cosmological objects with the age of the Universe. In the combined analysis with all the observations, we find the parameters of the model as R0=6.192-0.177+0.167xH02 and Ωm=0.278-0.278+0.273
Additional details
Identifiers
- DOI
- 10.1103/PhysRevD.76.044008;
- arXiv
- arXiv:0705.0889v1;
Publishing Information
- Journal Title
- Physical Review. D, Particles Fields
- Journal Volume
- 76
- Journal Issue
- 4
- Journal Page Range
- p. 044008-044008.12
- ISSN
- 0556-2821
- CODEN
- PRVDAQ
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 39049518
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; S71: CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS;
- Descriptors DEI
- BARYONS; COMPARATIVE EVALUATIONS; COSMIC RADIATION; COSMOLOGY; GRAVITATION; RELICT RADIATION; SUPERNOVAE; UNIVERSE
- Descriptors DEC
- BINARY STARS; ELECTROMAGNETIC RADIATION; ELEMENTARY PARTICLES; ERUPTIVE VARIABLE STARS; EVALUATION; FERMIONS; HADRONS; IONIZING RADIATIONS; MICROWAVE RADIATION; RADIATIONS; STARS; VARIABLE STARS
Optional Information
- Notes
- (c) 2007 The American Physical Society