New observational constraints on f ( R ) gravity from cosmic chronometers
- Departamento de Física, Universidade Federal de Juiz de Fora, 36036-330, Juiz de Fora, MG (Brazil)
- Department of Physical Sciences, Indian Institute of Science Education and Research—Kolkata, Mohanpur—741246, West Bengal (India)
- Physics Division, National Technical University of Athens, 15780 Zografou Campus, Athens (Greece)
We use the recently released cosmic chronometer data and the latest measured value of the local Hubble parameter, combined with the latest joint light curves of Supernovae Type Ia, and Baryon Acoustic Oscillation distance measurements, in order to impose constraints on the viable and most used f ( R ) gravity models. We consider four f ( R ) models, namely the Hu-Sawicki, the Starobinsky, the Tsujikawa, and the exponential one, and we parametrize them introducing a distortion parameter b that quantifies the deviation from ΛCDM cosmology. Our analysis reveals that a small but non-zero deviation from ΛCDM cosmology is slightly favored, with the corresponding fittings exhibiting very efficient AIC and BIC Information Criteria values. Clearly, f ( R ) gravity is consistent with observations, and it can serve as a candidate for modified gravity.
- OSTI ID:
- 22680113
- Journal Information:
- Journal of Cosmology and Astroparticle Physics, Vol. 2017, Issue 01; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 1475-7516
- Country of Publication:
- United States
- Language:
- English
Similar Records
Tomography from the next generation of cosmic shear experiments for viable f(R) models
Delicate f(R) gravity models with a disappearing cosmological constant and observational constraints on the model parameters