http://arxiv.org/abs/2211.16370
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 $w_{DE}$. 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 measurements (RSD), cosmic microwave background (CMB) and Big Bang nucleosynthesis (BBN) priors and Type Ia supernovae (SNe) measurements from the Pantheon set, in which the impact on the absolute magnitude is also considered. It is found that a state where a phantom crossing of $w_{DE}$ happens is favored by data, and while the $f(T)$ model is equivalent to the $\Lambda$CDM one by statistical criteria when CC+SNe+BAO+BBN data is considered, a considerable tension is found when CMB data is added. We also find that the Hubble tension is alleviated in the $f(T)$ model, at the same time that it does not worsen the growth one, indicating a possibility of the scenario as an option to address the current cosmic tensions.
F. Santos
Wed, 30 Nov 22
9/81
Comments: 14 pages, 3 figures, 2 tables