We could improve the fit by adding components, for instance a component in the valley between the two peaks. Adding this component slightly changes the q-Gaussian components that we can see in the Figure , because it is affecting their tails. This happens for anylet me stressany line shape we can consider, that is Lorentzian, Gaussian, Voigtian or pseudo-Voigtian, or others. If we add components, we necessarily modify those previously obtained.