Testing modified gravity models with recent cosmological observations

2012/02/29 by Wen-Shuai Zhang, Wenshuai Zhang, Cheng Cheng +6 · 2 citations
Physics and Astronomy · #Anisotropy #Astrophysics #Baryon acoustic oscillations #Black Holes and Theoretical Physics #Cosmic microwave background #Cosmological constant #Cosmology #Cosmology and Gravitation Theories #Dark energy #Hubble's law #Lambda-CDM model #Physics #Planck #Quantum mechanics #Solar and Space Plasma Dynamics #Theoretical physics #astro-ph.CO #gr-qc

paper · pdf · doi:10.1007/s11433-012-4945-9

published as Sci China-Phys Mech Astron, 2012, 55: 2244-2258 · 31 pages, 6 figures, 2 tables

arxiv created 2012/05/07 · openalex publication_date 2012/11/19 · arxiv updated 2013/03/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

We explore the cosmological implications of five modified gravity (MG) models by using the recent cosmological observational data, including the recently released SNLS3 type Ia supernovae sample, the cosmic microwave background anisotropy data from the Wilkinson Microwave Anisotropy Probe 7-yr observations, the baryon acoustic oscillation results from the Sloan Digital Sky Survey data release 7, and the latest Hubble constant measurement utilizing the Wide Field Camera 3 on the Hubble Space Telescope. The MG models considered include the Dvali-Gabadadze-Porrati(DGP) model, two f(R) models, and two f(T) models. We find that compared with the ΛCDM model, MG models can not lead to a appreciable reduction of the χ²_min. The analysis of AIC and BIC shows that the simplest cosmological constant model(ΛCDM) is still most preferred by the current data, and the DGP model is strongly disfavored. In addition, from the observational constraints, we also reconstruct the evolutions of the growth factor in these models. We find that the current available growth factor data are not enough to distinguish these MG models from the ΛCDM model.

Citations

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• k-Inflation

Cited by

• Narrowing down the possible explanations of cosmic acceleration with geometric probes
• Constraining ƒ(R) Gravity by the Large-Scale Structure