Cosmological constraints on $\gamma$-gravity models

Abstract

In this paper we place observational constraints on the well-known $\gamma$-gravity $f(R)$ model using the latest cosmological data, namely we use the latest growth rate, Cosmic Microwave Background, Baryon Acoustic Oscillations, Supernovae type Ia and Hubble parameter data. Performing a joint likelihood analysis we find that the $\gamma$-gravity model is in very good agreement with observations. Utilizing the AIC statistical test we statistically compare the current $f(R)$ model with $\Lambda$CDM cosmology and find that they are statistically equivalent. Therefore, $\gamma$-gravity can be seen as a useful scenario toward testing deviations from General Relativity. Finally, we note that we find somewhat higher values for the $f(R)$ best-fit values compared to those mentioned in the past in the literature and we argue that this could potential alleviate the halo-mass function problem.

9 pages, 6 figures, 4 tables. Changes match published version in PRD

References in corpus (26)

• Dynamics of dark energy
• Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
• The Clustering of the SDSS DR7 Main Galaxy Sample I: A 4 per cent Distance Measure at z=0.15
• Models of f(R) Cosmic Acceleration that Evade Solar-System Tests
• Cosmological Constraints from the SDSS Luminous Red Galaxies
• Disappearing cosmological constant in f(R) gravity
• Raising the bar: new constraints on the Hubble parameter with cosmic chronometers at z$\sim$2
• Modified f(R) gravity consistent with realistic cosmology: from matter dominated epoch to dark energy universe
• Supernova Constraints and Systematic Uncertainties from the First 3 Years of the Supernova Legacy Survey
• Class of viable modified $f(R)$ gravities describing inflation and the onset of accelerated expansion
• Baryon Acoustic Oscillations in the Lyα forest of BOSS DR11 quasars
• Cosmological viability of f(R)-gravity as an ideal fluid and its compatibility with a matter dominated phase
• Conditions for the cosmological viability of f(R) dark energy models
• Are f(R) dark energy models cosmologically viable ?
• Matter density perturbations and effective gravitational constant in modified gravity models of dark energy
• Testing cosmological structure formation using redshift-space distortions
• The Clustering of the SDSS Main Galaxy Sample II: Mock galaxy catalogues and a measurement of the growth of structure from Redshift Space Distortions at $z=0.15$
• Non-singular exponential gravity: a simple theory for early- and late-time accelerated expansion
• Testing LCDM with the Growth Function δ(a): Current Constraints
• On the Growth of Perturbations as a Test of Dark Energy
• Unification of Constant-roll Inflation and Dark Energy with Logarithmic $R^2$-corrected and Exponential $F(R)$ Gravity
• Density perturbations in f(R) gravity theories in metric and Palatini formalisms
• Growth rate of cosmological perturbations at z ~ 0.1 from a new observational test
• Nonlinear growth in modified gravity theories of dark energy
• Cosmological constraints and comparison of viable $f(R)$ models
• Constraint on reconstructed f(R) gravity models from gravitational waves

Cited by in corpus (7)

• Unraveling the effective fluid approach for $f(R)$ models in the subhorizon approximation
• Designing Horndeski and the effective fluid approach
• Hints of dark energy anisotropic stress using Machine Learning
• Generalised Ellis-Bronnikov Wormholes in $f(R)$ Gravity
• Cosmological constraints on non-adiabatic dark energy perturbations
• The Effective Fluid approach for Modified Gravity and its applications
• Tracking the validity of the quasi-static and sub-horizon approximations in modified gravity