Fig. 9.
Same as Fig. 8, but now showing a comparison of SN 2012aw with the model x1p5 (no CSM; left) and model x1p5ext3 (with CSM; right). The main effect of the CSM is to produce a slightly more luminous SN which peaks earlier, and which is in better agreement with observations. However the model is slightly too blue for the first month. This could probably be remedied by changes in the structure of the CSM. The spectroscopic comparisons after 30 d are very similar.
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