Toward a concordance teleparallel Cosmology II: Linear perturbation

Understand

Late time cosmic acceleration may be achieved by modifying gravity on large scales.

• This should also have consequences on the evolution of perturbations.
• We thus extend our study of exponential infrared $f(T)$ teleparallel gravity to examine the viability of the theory at the linear perturbation level, evaluating the full CMB and matter power spectra.
• As the theory does not introduce extra free parameters, it fits within the minimal six parameter space of standard $\Lambda$CDM.