Synthetic spectra for consistent ALImI-models calculated with (right-hand side) and without energy deposition (left-hand side) compared with the spectrum of SN 1992A (red line). The circumstance that the characteristic features and the overall shape of the SN Ia spectra obtained with and without energy deposition are quite similar is on the one hand based on the fact that a great part of the deposited energy is indeed induced at the inner boundary of the atmosphere, and on the other hand based on the gradients of the consistently calculated temperature structures which – apart from the innermost regions – are not much different for both types of models (cf. Fig. 19).