Fig. 8
NIR C iλ1.0693 μm line for four SNe Ia with NIR C i detection. Each panel presents the time evolution for each supernova with the phase relative to B maximum labeled for each spectrum. The solid green curves are the best-fit SYNAPPS models. Dashed red and dotted blue curves show the isolated contributions from C iλ1.0693 μm and Mg iiλ1.0927 μm, respectively. The velocity axes on the top are plotted with respect to the C iλ1.0693 μm line.
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