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- W2802319345 abstract "Red supergiants have been confirmed as the progenitor stars of the majority of hydrogen-rich type II supernovae1. However, while such stars are observed with masses >25 M⊙ (ref. 2), detections of >18 M⊙ progenitors remain elusive1. Red supergiants are also expected to form at all metallicities, but discoveries of explosions from low-metallicity progenitors are scarce. Here, we report observations of the type II supernova, SN 2015bs, for which we infer a progenitor metallicity of ≤0.1 Z⊙ from comparison to photospheric-phase spectral models3, and a zero-age main-sequence mass of 17–25 M⊙ through comparison to nebular-phase spectral models4,5. SN 2015bs displays a normal ‘plateau’ light-curve morphology, and typical spectral properties, implying a red supergiant progenitor. This is the first example of such a high-mass progenitor for a ‘normal’ type II supernova, suggesting a link between high-mass red supergiant explosions and low-metallicity progenitors. Supernova SN 2015bs is a hydrogen-rich type II supernova that appears to have been generated by a high-mass (>18 M⊙) and low-metallicity (<0.1 Z⊙) red supergiant progenitor." @default.
- W2802319345 created "2018-05-17" @default.
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- W2802319345 date "2018-05-07" @default.
- W2802319345 modified "2023-10-15" @default.
- W2802319345 title "The lowest-metallicity type II supernova from the highest-mass red supergiant progenitor" @default.
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- W2802319345 doi "https://doi.org/10.1038/s41550-018-0458-4" @default.
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