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Fig. 14.

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Comparison of the late mean spectrum of SN 2018ivc (+52 d) with those of some reference types IIL and IIb SNe, taken at late phases. The sample includes: SNe 1993J, 2011fu and 2013df (Shivvers et al. 2019) for type IIb, SNe 2001fa and 2007fz (Faran et al. 2014) for type IIL. SNe IIL have strong Hα and faint or no He I lines, the opposite is true for SNe IIb. Hα and the principal He I lines are marked by the vertical continuous and dashed lines, respectively.

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