Constraining f(R) models with cosmic chronometers and the HII galaxy Hubble diagram

Abstract

We consider several well-known f(R) cosmological models and constrain their parameters, namely the deviation parameter b and the cosmological parameters Ω_m and h. We first obtain analytical approximations for the Hubble rate H(z) and the luminosity distance d_L(z) in terms of these parameters, and then test these against the observational expansion rate derived from cosmic chronometers and the distance modulus in the HII galaxy Hubble diagram, obtained in a model-independent way using Gaussian Processes (GP). We first optimize the models based solely on the cosmic chronometers and then repeat this process with a joint analysis using both the cosmic chronometers and HII galaxies.

16 pages

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Cited by in corpus (8)

• The CosmoVerse White Paper: Addressing observational tensions in cosmology with systematics and fundamental physics
• New late-time constraints on $f(R)$ gravity
• Investigating the accelerated expansion of the Universe through updated constraints on viable $f(R)$ models within the metric formalism
• f(R) Gravity in an Ellipsoidal Universe
• Joint Constraints on the Hubble Constant, Spatial Curvature, and Sound Horizon from the Late-time Universe with Cosmography
• Joint Analysis of Constraints on f(R) Parametrization from Recent Cosmological Observations
• Testing Exponential $f(R)$ Gravity with CMB, DESI-DR2, and Supernova Data
• Observational constraints on a modified-gravity model with an exponential function of the curvature using the expansion history, the RSD, and the Pantheon+SH0ES data