On Warm Natural Inflation and Planck 2018 Constraints

We investigate natural inflation with non-minimal coupling to gravity, characterized either by a quadratic or periodic term, within the warm paradigm during slow-roll stage, in both strong and weak dissipation limits; show that, case of T-linearly dependent dissipative it can accommodate spectral index ns tensor-to-scalar ratio r observables given Planck 2018 constraints, albeit too-small value e-folding number solve horizon problem, providing, thus, only partial solution issues, assuming T-cubically term provide this issue.