The broad-lined Type-Ic supernova SN 2022xxf and its extraordinary two-humped light curves - I. Signatures of H/He-free interaction in the first four months

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Fig. 6

NIR spectra of SN 2022xxf in the JH (left panel) and HK bands (right panel), compared to those of SN IcBL l998bw (Patat et al. 2001) and SNe Ic PTF12gzk (Horesh et al. 2013; spectrum from PESSTO Data Release 1, Smartt et al. 2015), 2013ge (Drout et al. 2016), 2007gr (Hunter et al. 2009). Prominent emission lines are indicated by vertical lines corresponding to the rest wavelengths. Vertical gray shades indicate spectral regions affected by telluric absorption.

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