Updating constraints on phantom crossing f(T) gravity
F. B. M. dos Santos
Abstract
Abstract We establish constraints on f ( T ) gravity by considering the possibility of a scenario that supports a phantom crossing of the equation of state parameter ω DE . After determining the viable parameter space of the model, while checking the impact on the background dynamics, we perform an analysis to obtain constraints on cosmological parameters and determine the viability of this scenario. To this end, we use combined data sets from cosmic chronometers (CC), baryonic acoustic oscillations (BAO), redshift space distortion (RSD) and Type Ia supernovae (SN) measurements from the latest Pantheon+ set, in which the impact on the absolute magnitude due to the change of the effective gravitational constant is also considered. It is found that a state where a phantom crossing of ω DE happens is favored by data, and the f ( T ) model is competitive with the ΛCDM one by statistical criteria, such as AIC and BIC. Additionally, we find evidence of the Hubble tension being alleviated within the f ( T ) model, at the same time that it does not worsen the growth one, indicating a possibility of the present scenario as an option to address the current cosmic tensions.