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Fig. 8.
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Evolution of the Hα velocity. The velocity measurements for SNe 2010jl, 2015da, 2017hcc, and 2021irp are conducted using selected low-resolution spectra from Smith et al. (2012), Jencson et al. (2016), Tartaglia et al. (2020), Moran et al. (2023) and Reynolds et al. (2025a).
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