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Fig. 1


Nuclear heating rates of the explored parameter space, colours label Ye-values. Overlaid are bolometric lu- minosities computed following the description in Kasliwal et al. (2017) using updated photometry from (yellow circles). We show the total nuclear heating rate (luminosities divided by an ejecta mass of 1.5 × 10−2 M). Also shown is the heating rate of a wind with Ye = 0.5 that produces a substantial amount of nickel, see last panel in Fig. 2. The close agreement with Ye ≲ 0.3 strongly suggests the presence of substantial amounts of r-process matter.

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