Optical and infrared spectra are presented for the nova V2467 Cygni from the period of its maximum excitation. The spectra indicate exceptionally high excitation for a Fe ii -type nova, exhibiting [Si x ] 1.4305 μ m and several emission lines that we associate with C vi . Along with numerous coronal features, V2467 Cygni also displayed low-excitation nebular lines. A CLOUDY analysis indicates a temperature of 5.5 × 10 5 for its exciting source, a very heterogeneous emission line region, and an ejected mass ≥1.5 × 10 −4 L ☉ .
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Rudy et al. (2024) studied this question.
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