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

J. P. Anderson, L. Dessart, C. P. Gutiérrez, T. Krühler, L. Galbany, A. Jerkstrand, S. J. Smartt, C. Contreras, N. Morrell, M. M. Phillips, M. D. Stritzinger, E. Y. Hsiao, S. González-Gaitán, C. Agliozzo, S. Castellón, K. C. Chambers, T. W. Chen, H. Flewelling, C. Gonzalez, G. HosseinzadehM. Huber, M. Fraser, C. Inserra, E. Kankare, S. Mattila, E. Magnier, K. Maguire, T. B. Lowe, J. Sollerman, M. Sullivan, D. R. Young, S. Valenti

Resultado de la investigación: Contribución a una revistaArtículorevisión exhaustiva

18 Citas (Scopus)

Resumen

Red supergiants have been confirmed as the progenitor stars of the majority of hydrogen-rich type II supernovae. However, while such stars are observed with masses >25 M (ref. 2 ), detections of >18 M progenitors remain elusive 1 . 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 models 3, and a zero-age main-sequence mass of 17-25 M through comparison to nebular-phase spectral models. 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.

Idioma originalInglés
Páginas (desde-hasta)574-579
Número de páginas6
PublicaciónNature Astronomy
Volumen2
N.º7
DOI
EstadoPublicada - 1 jul 2018

Áreas temáticas de ASJC Scopus

  • Astronomía y astrofísica

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