Cardiff University | Prifysgol Caerdydd ORCA
Online Research @ Cardiff 
WelshClear Cookie - decide language by browser settings

The lowest-metallicity type II supernova from the highest-mass red supergiant progenitor

Anderson, J. P., Dessart, L., Gutiérrez, C. P., Krühler, T., Galbany, L., Jerkstrand, A., Smartt, S. J., Contreras, C., Morrell, N., Phillips, M. M., Stritzinger, M. D., Hsiao, E. Y., González-Gaitán, S., Agliozzo, C., Castellón, S., Chambers, K. C., Chen, T. -W., Flewelling, H., Gonzalez, C., Hosseinzadeh, G., Huber, M., Fraser, M., Inserra, C. ORCID:, Kankare, E., Mattila, S., Magnier, E., Maguire, K., Lowe, T. B., Sollerman, J., Sullivan, M., Young, D. R. and Valenti, S. 2018. The lowest-metallicity type II supernova from the highest-mass red supergiant progenitor. Nature Astronomy 2 (7) , pp. 574-579. 10.1038/s41550-018-0458-4

[thumbnail of 1805.04434.pdf]
PDF - Accepted Post-Print Version
Download (839kB) | Preview


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.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: Nature Publishing Group
ISSN: 2397-3366
Date of First Compliant Deposit: 2 January 2019
Date of Acceptance: 7 May 2018
Last Modified: 11 Nov 2023 11:51

Citation Data

Cited 23 times in Scopus. View in Scopus. Powered By Scopus® Data

Actions (repository staff only)

Edit Item Edit Item


Downloads per month over past year

View more statistics